{"id":19869,"date":"2021-12-17T13:13:23","date_gmt":"2021-12-17T06:13:23","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=19869"},"modified":"2021-12-17T13:13:25","modified_gmt":"2021-12-17T06:13:25","slug":"bat-phuong-trinh-va-he-bat-phuong-trinh-1-an","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bat-phuong-trinh-va-he-bat-phuong-trinh-1-an\/","title":{"rendered":"B\u1ea4T PH\u01af\u01a0NG TR\u00ccNH V\u00c0 H\u1ec6 B\u1ea4T PH\u01af\u01a0NG TR\u00ccNH 1 \u1ea8N"},"content":{"rendered":"<p><strong>I \u2013 KH\u00c1I NI\u1ec6M B\u1ea4T PH\u01af\u01a0NG TR\u00ccNH M\u1ed8T \u1ea8N<\/strong><\/p>\n<p><strong>1. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh m\u1ed9t \u1ea9n<\/strong><\/p>\n<p>B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh \u1ea9n <img decoding=\"async\" width=\"16\" height=\"16\" class=\"wp-image-19870\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_256-8.png\" alt=\"IMG_256\" \/> l\u00e0 m\u1ec7nh \u0111\u1ec1 ch\u1ee9a bi\u1ebfn c\u00f3 d\u1ea1ng<\/p>\n<p><img decoding=\"async\" width=\"319\" height=\"32\" class=\"wp-image-19871\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_257-7.png\" alt=\"IMG_257\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_257-7.png 319w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_257-7-300x30.png 300w\" sizes=\"(max-width: 319px) 100vw, 319px\" \/><\/p>\n<p>trong \u0111\u00f3 <img decoding=\"async\" width=\"41\" height=\"29\" class=\"wp-image-19872\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_258-8.png\" alt=\"IMG_258\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"29\" class=\"wp-image-19873\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_259-7.png\" alt=\"IMG_259\" \/> l\u00e0 nh\u1eefng bi\u1ec3u th\u1ee9c c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"16\" class=\"wp-image-19874\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_260-8.png\" alt=\"IMG_260\" \/><\/p>\n<p>Ta g\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"41\" height=\"29\" class=\"wp-image-19875\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_261-5.png\" alt=\"IMG_261\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"29\" class=\"wp-image-19876\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_262-6.png\" alt=\"IMG_262\" \/> l\u1ea7n l\u01b0\u1ee3t l\u00e0 v\u1ebf tr\u00e1i c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"29\" class=\"wp-image-19877\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_263-7.png\" alt=\"IMG_263\" \/> S\u1ed1 th\u1ef1c <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"25\" class=\"wp-image-19878\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_264-6.png\" alt=\"IMG_264\" \/> sao cho <img loading=\"lazy\" decoding=\"async\" width=\"226\" height=\"32\" class=\"wp-image-19879\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_265-6.png\" alt=\"IMG_265\" \/> l\u00e0 m\u1ec7nh \u0111\u1ec1 \u0111\u00fang \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"29\" class=\"wp-image-19880\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_266-6.png\" alt=\"IMG_266\" \/><\/p>\n<p>Gi\u1ea3i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh l\u00e0 t\u00ecm t\u1eadp nghi\u1ec7m c\u1ee7a n\u00f3, khi t\u1eadp nghi\u1ec7m r\u1ed7ng th\u00ec ta n\u00f3i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh v\u00f4 nghi\u1ec7m.<\/p>\n<p><strong><em>Ch\u00fa \u00fd:<\/em><\/strong><\/p>\n<p>B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-19881\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_267-7.png\" alt=\"IMG_267\" \/> c\u0169ng c\u00f3 th\u1ec3 vi\u1ebft l\u1ea1i d\u01b0\u1edbi d\u1ea1ng sau: <img loading=\"lazy\" decoding=\"async\" width=\"205\" height=\"32\" class=\"wp-image-19882\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_268-7.png\" alt=\"IMG_268\" \/><\/p>\n<p><strong>2. \u0110i\u1ec1u ki\u1ec7n c\u1ee7a m\u1ed9t b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh<\/strong><\/p>\n<p>T\u01b0\u01a1ng t\u1ef1 \u0111\u1ed1i v\u1edbi ph\u01b0\u01a1ng tr\u00ecnh, ta g\u1ecdi c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ee7a \u1ea9n s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" class=\"wp-image-19883\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_269-7.png\" alt=\"IMG_269\" \/> \u0111\u1ec3 <img loading=\"lazy\" decoding=\"async\" width=\"41\" height=\"29\" class=\"wp-image-19884\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_270-5.png\" alt=\"IMG_270\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"29\" class=\"wp-image-19885\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_271-7.png\" alt=\"IMG_271\" \/> c\u00f3 ngh\u0129a l\u00e0 \u0111i\u1ec1u ki\u1ec7n x\u00e1c \u0111\u1ecbnh (hay g\u1ecdi t\u1eaft l\u00e0 \u0111i\u1ec1u ki\u1ec7n) c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"29\" class=\"wp-image-19886\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_272-7.png\" alt=\"IMG_272\" \/><\/p>\n<p><strong>3. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh ch\u1ee9a tham s\u1ed1<\/strong><\/p>\n<p>Trong m\u1ed9t b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh, ngo\u00e0i c\u00e1c ch\u1eef \u0111\u00f3ng vai tr\u00f2 \u1ea9n s\u1ed1 c\u00f2n c\u00f3 th\u1ec3 c\u00f3 c\u00e1c ch\u1eef kh\u00e1c \u0111\u01b0\u1ee3c xem nh\u01b0 nh\u1eefng h\u1eb1ng s\u1ed1 v\u00e0 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 tham s\u1ed1. Gi\u1ea3i v\u00e0 bi\u1ec7n lu\u1eadn b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh ch\u1ee9a tham s\u1ed1 l\u00e0 x\u00e9t xem v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb n\u00e0o c\u1ee7a tham s\u1ed1 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh v\u00f4 nghi\u1ec7m, b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 nghi\u1ec7m v\u00e0 t\u00ecm c\u00e1c nghi\u1ec7m \u0111\u00f3.<\/p>\n<p><strong>II \u2013 H\u1ec6 B\u1ea4T PH\u01af\u01a0NG TR\u00ccNH M\u1ed8T \u1ea8N<\/strong><\/p>\n<p>H\u1ec7 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh \u1ea9n <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" class=\"wp-image-19887\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_273-6.png\" alt=\"IMG_273\" \/> g\u1ed3m m\u1ed9t s\u1ed1 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh \u1ea9n <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" class=\"wp-image-19888\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_274-7.png\" alt=\"IMG_274\" \/> m\u00e0 ta ph\u1ea3i t\u00ecm nghi\u1ec7m chung c\u1ee7a ch\u00fang.<\/p>\n<p>M\u1ed7i gi\u00e1 tr\u1ecb c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" class=\"wp-image-19889\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_275-6.png\" alt=\"IMG_275\" \/> \u0111\u1ed3ng th\u1eddi l\u00e0 nghi\u1ec7m c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh c\u1ee7a h\u1ec7 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh \u0111\u00e3 cho.<\/p>\n<p>Gi\u1ea3i h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh l\u00e0 t\u00ecm t\u1eadp nghi\u1ec7m c\u1ee7a n\u00f3.<\/p>\n<p>\u0110\u1ec3 gi\u1ea3i m\u1ed9t h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh ta gi\u1ea3i t\u1eebng b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh r\u1ed3i l\u1ea5y giao c\u1ee7a c\u00e1c t\u1eadp nghi\u1ec7m.<\/p>\n<p><strong>III \u2013 M\u1ed8T S\u1ed0 PH\u00c9P BI\u1ebeN \u0110\u1ed4I B\u1ea4T PH\u01af\u01a0NG TR\u00ccNH<\/strong><\/p>\n<p><strong>1. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/strong><\/p>\n<p>Ta \u0111\u00e3 bi\u1ebft hai b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 c\u00f9ng t\u1eadp nghi\u1ec7m (c\u00f3 th\u1ec3 r\u1ed7ng) l\u00e0 hai b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u00e0 d\u00f9ng k\u00ed hi\u1ec7u <img loading=\"lazy\" decoding=\"async\" width=\"41\" height=\"21\" class=\"wp-image-19890\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_276-7.png\" alt=\"IMG_276\" \/> \u0111\u1ec3 ch\u1ec9 s\u1ef1 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a hai b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh \u0111\u00f3.<\/p>\n<p>T\u01b0\u01a1ng t\u1ef1, khi hai h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 c\u00f9ng m\u1ed9t t\u1eadp nghi\u1ec7m ta c\u0169ng n\u00f3i ch\u00fang t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi nhau v\u00e0 d\u00f9ng k\u00ed hi\u1ec7u <img loading=\"lazy\" decoding=\"async\" width=\"41\" height=\"21\" class=\"wp-image-19891\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_277-7.png\" alt=\"IMG_277\" \/> \u0111\u1ec3 ch\u1ec9 s\u1ef1 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng \u0111\u00f3.<\/p>\n<p><strong>2. Ph\u00e9p bi\u1ebfn \u0111\u1ed5i t\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/strong><\/p>\n<p>\u0110\u1ec3 gi\u1ea3i m\u1ed9t b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh (h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh) ta li\u00ean ti\u1ebfp bi\u1ebfn \u0111\u1ed5i n\u00f3 th\u00e0nh nh\u1eefng b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh (h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh) t\u01b0\u01a1ng \u0111\u01b0\u01a1ng cho \u0111\u1ebfn khi \u0111\u01b0\u1ee3c b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh (h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh) \u0111\u01a1n gi\u1ea3n nh\u1ea5t m\u00e0 ta c\u00f3 th\u1ec3 vi\u1ebft ngay t\u1eadp nghi\u1ec7m. C\u00e1c ph\u00e9p bi\u1ebfn \u0111\u1ed5i nh\u01b0 v\u1eady \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e1c ph\u00e9p bi\u1ebfn \u0111\u1ed5i t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/p>\n<p><strong>3. C\u1ed9ng (tr\u1eeb)<\/strong><\/p>\n<p>C\u1ed9ng (tr\u1eeb) hai v\u1ebf c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh v\u1edbi c\u00f9ng m\u1ed9t bi\u1ec3u th\u1ee9c m\u00e0 kh\u00f4ng l\u00e0m thay \u0111\u1ed5i \u0111i\u1ec1u ki\u1ec7n c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh ta \u0111\u01b0\u1ee3c m\u1ed9t b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"317\" height=\"36\" class=\"wp-image-19892\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_278-7.png\" alt=\"IMG_278\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_278-7.png 317w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_278-7-300x34.png 300w\" sizes=\"(max-width: 317px) 100vw, 317px\" \/><\/p>\n<p><strong>4. Nh\u00e2n (chia) <\/strong><\/p>\n<p>Nh\u00e2n (chia) hai v\u1ebf c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh v\u1edbi c\u00f9ng m\u1ed9t bi\u1ec3u th\u1ee9c lu\u00f4n nh\u1eadn gi\u00e1 tr\u1ecb d\u01b0\u01a1ng (m\u00e0 kh\u00f4ng l\u00e0m thay \u0111\u1ed5i \u0111i\u1ec1u ki\u1ec7n c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh) ta \u0111\u01b0\u1ee3c m\u1ed9t b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. Nh\u00e2n (chia) hai v\u1ebf c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh v\u1edbi c\u00f9ng m\u1ed9t bi\u1ec3u th\u1ee9c lu\u00f4n nh\u1eadn gi\u00e1 tr\u1ecb \u00e2m (m\u00e0 kh\u00f4ng l\u00e0m thay \u0111\u1ed5i \u0111i\u1ec1u ki\u1ec7n c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh) v\u00e0 \u0111\u1ed5i chi\u1ec1u b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh ta \u0111\u01b0\u1ee3c m\u1ed9t b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"405\" height=\"65\" class=\"wp-image-19893\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_279-5.png\" alt=\"IMG_279\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_279-5.png 405w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_279-5-300x48.png 300w\" sizes=\"(max-width: 405px) 100vw, 405px\" \/><\/p>\n<p><strong>5. B\u00ecnh ph\u01b0\u01a1ng<\/strong><\/p>\n<p>B\u00ecnh ph\u01b0\u01a1ng hai v\u1ebf c\u1ee7a m\u1ed9t b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 hai v\u1ebf kh\u00f4ng \u00e2m m\u00e0 kh\u00f4ng l\u00e0m thay \u0111\u1ed5i \u0111i\u1ec1u ki\u1ec7n c\u1ee7a n\u00f3 ta \u0111\u01b0\u1ee3c m\u1ed9t b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"411\" height=\"37\" class=\"wp-image-19894\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_280-7.png\" alt=\"IMG_280\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_280-7.png 411w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_280-7-300x27.png 300w\" sizes=\"(max-width: 411px) 100vw, 411px\" \/><\/p>\n<p><strong>6. Ch\u00fa \u00fd<\/strong><\/p>\n<p>Trong qu\u00e1 tr\u00ecnh bi\u1ebfn \u0111\u1ed5i m\u1ed9t b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh th\u00e0nh b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ea7n ch\u00fa \u00fd nh\u1eefng \u0111i\u1ec1u sau<\/p>\n<ol>\n<li>Khi bi\u1ebfn \u0111\u1ed5i c\u00e1c bi\u1ec3u th\u1ee9c \u1edf hai v\u1ebf c\u1ee7a m\u1ed9t b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh th\u00ec \u0111i\u1ec1u ki\u1ec7n c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 th\u1ec3 b\u1ecb thay \u0111\u1ed5i. V\u00ec v\u1eady, \u0111\u1ec3 t\u00ecm nghi\u1ec7m c\u1ee7a m\u1ed9t b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh ta ph\u1ea3i t\u00ecm c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" class=\"wp-image-19895\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_281-7.png\" alt=\"IMG_281\" \/> th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh \u0111\u00f3 v\u00e0 l\u00e0 nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh m\u1edbi.<\/li>\n<li>Khi nh\u00e2n (chia) hai v\u1ebf c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"94\" height=\"29\" class=\"wp-image-19896\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_282-7.png\" alt=\"IMG_282\" \/> v\u1edbi bi\u1ec3u th\u1ee9c <img loading=\"lazy\" decoding=\"async\" width=\"41\" height=\"29\" class=\"wp-image-19897\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_283-7.png\" alt=\"IMG_283\" \/> ta c\u1ea7n l\u01b0u \u00fd \u0111\u1ebfn \u0111i\u1ec1u ki\u1ec7n v\u1ec1 d\u1ea5u c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"47\" height=\"29\" class=\"wp-image-19898\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_284-7.png\" alt=\"IMG_284\" \/> N\u1ebfu <img loading=\"lazy\" decoding=\"async\" width=\"41\" height=\"29\" class=\"wp-image-19899\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_285-7.png\" alt=\"IMG_285\" \/> nh\u1eadn c\u1ea3 gi\u00e1 tr\u1ecb d\u01b0\u01a1ng l\u1eabn gi\u00e1 tr\u1ecb \u00e2m th\u00ec ta ph\u1ea3i l\u1ea7n l\u01b0\u1ee3t x\u00e9t t\u1eebng tr\u01b0\u1eddng h\u1ee3p. M\u1ed7i tr\u01b0\u1eddng h\u1ee3p d\u1eabn \u0111\u1ebfn h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh.<\/li>\n<li>Khi gi\u1ea3i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"94\" height=\"29\" class=\"wp-image-19900\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_286-6.png\" alt=\"IMG_286\" \/> m\u00e0 ph\u1ea3i b\u00ecnh ph\u01b0\u01a1ng hai v\u1ebf th\u00ec ta l\u1ea7n l\u01b0\u1ee3t x\u00e9t hai tr\u01b0\u1eddng h\u1ee3p<\/li>\n<li><img loading=\"lazy\" decoding=\"async\" width=\"86\" height=\"29\" class=\"wp-image-19901\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_287-7.png\" alt=\"IMG_287\" \/> c\u00f9ng c\u00f3 gi\u00e1 tr\u1ecb kh\u00f4ng \u00e2m, ta b\u00ecnh ph\u01b0\u01a1ng hai v\u1ebf b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh.<\/li>\n<li><img loading=\"lazy\" decoding=\"async\" width=\"86\" height=\"29\" class=\"wp-image-19902\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_288-7.png\" alt=\"IMG_288\" \/> c\u00f9ng c\u00f3 gi\u00e1 tr\u1ecb \u00e2m ta vi\u1ebft<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"231\" height=\"29\" class=\"wp-image-19903\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_289-8.png\" alt=\"IMG_289\" \/><\/p>\n<p>r\u1ed3i b\u00ecnh ph\u01b0\u01a1ng hai v\u1ebf b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh m\u1edbi.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I \u2013 KH\u00c1I NI\u1ec6M B\u1ea4T PH\u01af\u01a0NG TR\u00ccNH M\u1ed8T \u1ea8N 1. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh m\u1ed9t \u1ea9n B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh \u1ea9n l\u00e0 m\u1ec7nh \u0111\u1ec1 ch\u1ee9a bi\u1ebfn c\u00f3 d\u1ea1ng trong \u0111\u00f3 v\u00e0 l\u00e0 nh\u1eefng bi\u1ec3u th\u1ee9c c\u1ee7a Ta g\u1ecdi v\u00e0 l\u1ea7n l\u01b0\u1ee3t l\u00e0 v\u1ebf tr\u00e1i c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh S\u1ed1 th\u1ef1c sao cho l\u00e0 m\u1ec7nh \u0111\u1ec1 \u0111\u00fang \u0111\u01b0\u1ee3c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[41],"tags":[],"class_list":["post-19869","post","type-post","status-publish","format-standard","hentry","category-toan-lop-10"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/19869","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=19869"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/19869\/revisions"}],"predecessor-version":[{"id":19904,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/19869\/revisions\/19904"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=19869"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=19869"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=19869"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}