{"id":877,"date":"2021-10-07T23:38:27","date_gmt":"2021-10-07T23:38:27","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=877"},"modified":"2021-10-14T22:11:37","modified_gmt":"2021-10-14T15:11:37","slug":"phan-tich-da-thuc-thanh-nhan-tu-bang-8-phuong-phap-toan-hoc-8","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/phan-tich-da-thuc-thanh-nhan-tu-bang-8-phuong-phap-toan-hoc-8\/","title":{"rendered":"Ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed b\u1eb1ng 8 ph\u01b0\u01a1ng ph\u00e1p \u2013 To\u00e1n h\u1ecdc 8"},"content":{"rendered":"\n<script type=\"text\/javascript\">\nimg_numb = 10;\n<\/script>\n\n\n\n<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p>C\u00e1c em <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> l\u1edbp 8 h\u1eb3n \u0111ang trong qu\u00e1 tr\u00ecnh h\u1ecdc c\u00e1c ki\u1ebfn th\u1ee9c li\u00ean quan \u0111\u1ebfn ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed? \u0110\u00e2y l\u00e0 m\u1ed9t ki\u1ebfn th\u1ee9c kh\u00f4ng th\u1ec3 thi\u1ebfu trong ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc v\u00e0 b\u1eaft bu\u1ed9c c\u00e1c em ph\u1ea3i n\u1eafm \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c c\u0169ng nh\u01b0 \u00e1p d\u1ee5ng th\u1ef1c h\u00e0nh t\u1ed1t. C\u00f9ng Vietlearn \u00f4n l\u1ea1i ki\u1ebfn th\u1ee9c n\u00e0y nh\u00e9.<\/p>\n\n\n\n<p>Ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed l\u00e0 g\u00ec?<\/p>\n\n\n\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc trong <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n<\/a> h\u1ecdc l\u1edbp 8. Ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed l\u1edbp 8 ch\u00ednh l\u00e0 d\u00f9ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec3 bi\u1ebfn \u0111\u1ed5i \u0111a th\u1ee9c th\u00e0nh t\u00edch c\u1ee7a nh\u1eefng \u0111a th\u1ee9c. Nh\u01b0 v\u1eady, c\u00f3 th\u1ec3 th\u1ea5y, vai tr\u00f2 c\u1ee7a ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh t\u1eed c\u00f3 vai tr\u00f2 r\u1ea5t nhi\u1ec1u trong vi\u1ec7c r\u00fat g\u1ecdn bi\u1ec3u th\u1ee9c c\u0169ng nh\u01b0 gi\u00fap ng\u01b0\u1eddi l\u00e0m t\u00ednh to\u00e1n nhanh, gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng v\u00e0 thu\u1eadn l\u1ee3i.<\/p>\n\n\n\n<p>Ch\u00ednh v\u00ec th\u1ebf, vi\u1ec7c n\u1eafm \u0111\u01b0\u1ee3c c\u00e1c ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i b\u00e0i t\u1eadp n\u00e0y s\u1ebd gi\u00fap cho c\u00e1c em c\u00f3 th\u1ec3 linh ho\u1ea1t trong gi\u1ea3i c\u00e1c b\u00e0i to\u00e1n kh\u00e1c nhau, \u0111\u1ed3ng th\u1eddi t\u00ecm ki\u1ebfm \u0111\u00e1p \u00e1n nhanh v\u00e0 ch\u00ednh x\u00e1c nh\u1ea5t.<\/p>\n\n\n\n<p>8 ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed<\/p>\n\n\n\n<p>Trong to\u00e1n 8 ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed, c\u00f3 8 ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau m\u00e0 c\u00e1c em ho\u00e0n to\u00e0n \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c. C\u00f9ng t\u00ecm hi\u1ec3u t\u1eebng ph\u01b0\u01a1ng ph\u00e1p nh\u00e9.<\/p>\n\n\n\n<p>Ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u1eb7t nh\u00e2n t\u1eed chung<\/p>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ea7u ti\u00ean c\u00e1c em c\u1ea7n ph\u1ea3i nh\u1edb ch\u00ednh l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u1eb7t nh\u00e2n t\u1eed chung. Ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c hi\u1ec7n c\u1ee7a b\u00e0i to\u00e1n n\u00e0y ch\u00ednh l\u00e0 t\u00ecm nh\u00e2n t\u1eed chung c\u1ee7a nh\u1eefng \u0111\u01a1n th\u1ee9c, \u0111a th\u1ee9c c\u00f3 m\u1eb7t trong t\u1ea5t c\u1ea3 c\u00e1c h\u1ea1ng t\u1eed b\u00e0i to\u00e1n \u0111\u01b0a ra. Sau \u0111\u00f3, ph\u00e2n t\u00edch m\u1ed7i h\u1ea1ng t\u1eed th\u00e0nh t\u00edch c\u1ee7a nh\u00e2n t\u1eed chung v\u00e0 m\u1ed9t nh\u00e2n t\u1eed kh\u00e1c. Nh\u00e2n t\u1eed chung \u0111\u01b0\u1ee3c \u0111\u1eb7t ra ngo\u00e0i d\u1ea5u ngo\u1eb7c, b\u00ean trong d\u1ea5u ngo\u1eb7c l\u00e0 c\u00e1c nh\u00e2n t\u1eed c\u00f2n l\u1ea1i c\u00f9ng ph\u00e9p t\u00ednh \u0111i c\u00f9ng.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u1eb7t nh\u00e2n t\u1eed chung - B\u00e0i 6 - To\u00e1n 8(D\u1ec4 HI\u1ec2U NH\u1ea4T)\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/NbK-2uM9jYc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption>Ph\u01b0\u01a1ng ph\u00e1p \u0111\u1eb7t nh\u00e2n t\u1eed chung<\/figcaption><\/figure>\n\n\n\n<p>\u0110\u1ec3 d\u1ec5 hi\u1ec3u, ch\u00fang ta c\u00f3 c\u00f4ng th\u1ee9c sau:<\/p>\n\n\n\n<p>A.B + C.B \u2013 B.Q=B.(A + C-Q)<\/p>\n\n\n\n<p>L\u1ea5y v\u00ed d\u1ee5, ph\u00e2n t\u00edch c\u00e1c \u0111a th\u1ee9c sau th\u00e0nh nh\u00e2n t\u1eed:<\/p>\n\n\n\n<p>28a<sup>2<\/sup>b<sup>2<\/sup> \u2013 21ab<sup>2<\/sup> + 14a<sup>2<\/sup>b = 7ab(4ab \u2013 3b + 2a)<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"268\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/10\/Vi-du-ve-phuong-phap-nhom-hang-tu.jpg\" alt=\"V\u00ed d\u1ee5 v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p nh\u00f3m h\u1ea1ng t\u1eed\" class=\"wp-image-2227\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Vi-du-ve-phuong-phap-nhom-hang-tu.jpg 600w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Vi-du-ve-phuong-phap-nhom-hang-tu-300x134.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><figcaption><em>V\u00ed d\u1ee5 v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p nh\u00f3m h\u1ea1ng t\u1eed<\/em><\/figcaption><\/figure>\n\n\n\n<p>Nh\u01b0 v\u1eady, m\u1ea5u ch\u1ed1t c\u1ee7a b\u00e0i to\u00e1n n\u00e0y ch\u00ednh l\u00e0 ch\u00fang ta ph\u1ea3i \u0111\u01b0a bi\u1ec3u th\u1ee9c \u0111\u00e3 cho v\u1ec1 d\u1ea1ng t\u00edch c\u1ee7a nhi\u1ec1u \u0111a th\u1ee9c, t\u00ecm \u0111\u01b0\u1ee3c nh\u00e2n t\u1eed chung c\u1ee7a ch\u00fang.<\/p>\n\n\n\n<p>Ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p d\u00f9ng h\u1eb1ng \u0111\u1eb3ng th\u1ee9c<\/p>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c hi\u1ec7n v\u1edbi c\u00e1c b\u00e0i n\u00e0y ch\u00ednh l\u00e0 d\u00f9ng c\u00e1c h\u1eb1ng \u0111\u1eb3ng th\u1ee9c \u0111\u00e1ng nh\u1edb \u0111\u1ec3 ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed. Vi\u1ec7c v\u1eadn d\u1ee5ng h\u1eb1ng \u0111\u1eb3ng th\u1ee9c l\u00e0 b\u1eaft bu\u1ed9c \u1edf trong c\u00e1c b\u00e0i to\u00e1n d\u1ea1ng n\u00e0y. C\u00e1c c\u00f4ng th\u1ee9c h\u1eb1ng \u0111\u1eb3ng th\u1ee9c c\u00e1c em \u0111\u00e3 \u0111\u01b0\u1ee3c h\u1ecdc \u1edf b\u00e0i tr\u01b0\u1edbc v\u00e0 \u00e1p d\u1ee5ng v\u00e0o b\u00e0i n\u00e0y nh\u00e9.<\/p>\n\n\n\n<p>L\u1ea5y v\u00ed d\u1ee5 ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed cho ph\u00e9p t\u00ednh: 9&#215;2 \u2013 4 = (3x)2 \u2013 22 = ( 3x\u2013 2)(3x + 2)<\/p>\n\n\n\n<p>Ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nh\u00f3m h\u1ea1ng t\u1eed<\/p>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p th\u1ee9 ba m\u00e0 Vietlearn s\u1ebd gi\u1edbi thi\u1ec7u v\u1edbi c\u00e1c em ch\u00ednh l\u00e0 ph\u01b0\u01a1ng ph\u00e1p nh\u00f3m h\u1ea1ng t\u1eed. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1ebd nh\u00f3m t\u1eebng h\u1ea1ng t\u1eed th\u00edch h\u1ee3p theo t\u1eebng nh\u00f3m, sau \u0111\u00f3 \u00e1p d\u1ee5ng li\u00ean ti\u1ebfp ph\u01b0\u01a1ng ph\u00e1p d\u00f9ng h\u1eb1ng \u0111\u1eb3ng th\u1ee9c ho\u1eb7c ph\u01b0\u01a1ng ph\u00e1p \u0111\u1eb7t nh\u00e2n t\u1eed chung.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5 v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p nh\u00f3m h\u1ea1ng t\u1eed<\/p>\n\n\n\n<p>\u0110\u00e2y c\u0169ng \u0111\u01b0\u1ee3c xem l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed b\u1eb1ng c\u00e1ch ph\u1ed1i h\u1ee3p nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau khi th\u1ef1c hi\u1ec7n.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nh\u00f3m h\u1ea1ng t\u1eed - B\u00e0i 8 - To\u00e1n 8 - C\u00f4 Chi (HAY NH\u1ea4T)\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/1Xtxy64EmbM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption>Ph\u01b0\u01a1ng ph\u00e1p nh\u00f3m h\u1ea1ng t\u1eed<\/figcaption><\/figure>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p t\u00e1ch m\u1ed9t h\u1ea1ng t\u1eed th\u00e0nh hai hay nhi\u1ec1u h\u1ea1ng t\u1eed.<\/p>\n\n\n\n<p>\u0110\u00e2y c\u0169ng l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed. Ta c\u00f3 th\u1ec3 t\u00e1ch 1 h\u1ea1ng t\u1eed n\u00e0o \u0111\u00f3 th\u00e0nh 2 hay nhi\u1ec1u h\u1ea1ng t\u1eed th\u00edch h\u1ee3p. M\u1ee5c \u0111\u00edch l\u00e0 l\u00e0m xu\u1ea5t hi\u1ec7n nh\u1eefng nh\u00f3m h\u1ea1ng t\u1eed v\u00e0 ti\u1ebfp t\u1ee5c s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c \u0111\u1ec3 gi\u1ea3i b\u00e0i to\u00e1n.<\/p>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y y\u00eau c\u1ea7u ng\u01b0\u1eddi h\u1ecdc ph\u1ea3i nh\u00ecn ra \u0111\u01b0\u1ee3c h\u1ea1ng t\u1eed c\u1ea7n t\u00e1ch, sau \u0111\u00f3 m\u1edbi c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c v\u00e0o b\u00e0i.<\/p>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p th\u00eam b\u1edbt c\u00f9ng m\u1ed9t h\u1ea1ng t\u1eed<\/p>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c hi\u1ec7n c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p n\u00e0y ch\u00ednh l\u00e0 c\u00f3 th\u1ec3 th\u00eam ho\u1eb7c b\u1edbt m\u1ed9t h\u1ea1ng t\u1eed n\u00e0o \u0111\u00f3 c\u1ee7a \u0111a th\u1ee9c \u0111\u1ec3 \u0111\u01b0a n\u00f3 v\u1ec1 nh\u00f3m h\u1ea1ng t\u1eed m\u00e0 \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c c\u00e1c ph\u01b0\u01a1ng ph\u00e1p tr\u01b0\u1edbc, c\u00f3 th\u1ec3 l\u00e0 d\u00f9ng h\u1eb1ng \u0111\u1eb3ng th\u1ee9c, \u0111\u1eb7t nh\u00e2n t\u1eed chung\u2026<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/10\/Bai-tap-vi-du-ve-phuong-phap-them-bot-mot-hang-tu.jpg\" alt=\"B\u00e0i t\u1eadp v\u00ed d\u1ee5 v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p th\u00eam b\u1edbt m\u1ed9t h\u1ea1ng t\u1eed\" class=\"wp-image-2228\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Bai-tap-vi-du-ve-phuong-phap-them-bot-mot-hang-tu.jpg 600w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Bai-tap-vi-du-ve-phuong-phap-them-bot-mot-hang-tu-300x200.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><figcaption><em>B\u00e0i t\u1eadp v\u00ed d\u1ee5 v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p th\u00eam b\u1edbt m\u1ed9t h\u1ea1ng t\u1eed<\/em><\/figcaption><\/figure>\n\n\n\n<p>B\u00e0i t\u1eadp v\u00ed d\u1ee5 v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p th\u00eam b\u1edbt m\u1ed9t h\u1ea1ng t\u1eed<\/p>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p \u0111\u1eb7t bi\u1ebfn ph\u1ee5<\/p>\n\n\n\n<p>3 ph\u01b0\u01a1ng ph\u00e1p cu\u1ed1i l\u00e0 3 ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed n\u00e2ng cao. Trong m\u1ed9t s\u1ed1 b\u00e0i to\u00e1n, \u0111\u1ec3 ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed m\u1ed9t c\u00e1ch thu\u1eadn l\u1ee3i, ch\u00fang ta c\u1ea7n \u0111\u1eb7t bi\u1ebfn ph\u1ee5 (\u1ea9n ph\u1ee5) th\u00edch h\u1ee3p. Ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c hi\u1ec7n c\u1ee7a ph\u00e9p ph\u00e2n t\u00edch n\u00e0y ch\u00ednh l\u00e0 \u0111\u1eb7t \u1ea9n ph\u1ee5 \u0111\u1ec3 \u0111\u01b0a d\u1ea1ng tam th\u1ee9c b\u1eadc hai r\u1ed3i s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u01a1 b\u1ea3n nh\u01b0 \u1edf tr\u00ean.<\/p>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p x\u00e9t gi\u00e1 tr\u1ecb ri\u00eang<\/p>\n\n\n\n<p>\u0110\u1ec3 l\u00e0m theo ph\u01b0\u01a1ng ph\u00e1p n\u00e0y, ch\u00fang ta c\u1ea7n x\u00e1c \u0111\u1ecbnh c\u00e1c nh\u00e2n t\u1eed ch\u1ee9a bi\u1ebfn c\u1ee7a \u0111a th\u1ee9c, sau \u0111\u00f3 g\u00e1n cho c\u00e1c bi\u1ebfn nh\u1eefng gi\u00e1 tr\u1ecb c\u1ee5 th\u1ec3 \u0111\u1ec3 t\u1eeb \u0111\u00f3 x\u00e1c \u0111\u1ecbnh c\u00e1c nh\u00e2n t\u1eed c\u00f2n l\u1ea1i.<\/p>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p h\u1ec7 s\u1ed1 b\u1ea5t \u0111\u1ecbnh<\/p>\n\n\n\n<p>\u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p cu\u1ed1i c\u00f9ng Vietlearn mu\u1ed1n gi\u1edbi thi\u1ec7u t\u1edbi c\u00e1c em. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng vi\u1ec7c ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh t\u00edch c\u1ee7a hai \u0111a th\u1ee9c b\u1eadc nh\u1ea5t v\u00e0 b\u1eadc hai, ho\u1eb7c m\u1ed9t \u0111a th\u1ee9c b\u1eadc hai d\u1ea1ng ( a + b)( cx2 + dx +m), sau \u0111\u00f3, bi\u1ebfn \u0111\u1ed5i \u0111\u1ed3ng nh\u1ea5t h\u1ec7 s\u1ed1 c\u1ee7a \u0111a th\u1ee9c n\u00e0y v\u1edbi h\u1ec7 s\u1ed1 c\u1ee7a \u0111a th\u1ee9c kia.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p d\u00f9ng h\u1eb1ng \u0111\u1eb3ng th\u1ee9c - B\u00e0i 7 - To\u00e1n h\u1ecdc 8 (HAY NH\u1ea4T)\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/KJdP6UNqs30?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption>Ph\u01b0\u01a1ng ph\u00e1p d\u00f9ng h\u1eb1ng \u0111\u1eb3ng th\u1ee9c<\/figcaption><\/figure>\n\n\n\n<p>T\u00f3m l\u1ea1i, c\u00f3 r\u1ea5t nhi\u1ec1u c\u00e1ch ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed kh\u00e1c nhau, t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao. M\u1ed9t m\u1eb9o d\u00e0nh cho c\u00e1c em l\u00e0 h\u1ecdc t\u1ed1t c\u00e1c <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n<\/a> \u0111\u00e3, b\u1edfi \u0111\u00e2y l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 c\u00e1c em gi\u1ea3i c\u00e1c b\u00e0i phanat \u00edch n\u00e2ng cao h\u01a1n. Ch\u00fac c\u00e1c em th\u00e0nh c\u00f4ng!<\/p>\n\n\n\n<p>Xem ngay:<\/p>\n\n\n\n<p>Nh\u1eefng h\u1eb1ng \u0111\u1eb3ng th\u1ee9c \u0111\u00e1ng nh\u1edb<\/p>\n\n\n\n<p>Chia \u0111\u01a1n th\u1ee9c cho \u0111\u01a1n th\u1ee9c<\/p>\n\n\n\n<p>Ph\u01b0\u01a1ng tr\u00ecnh t\u00edch \u2013 Kh\u00e1i ni\u1ec7m, c\u00e1c b\u01b0\u1edbc gi\u1ea3i v\u00e0 g\u1ee3i \u00fd c\u00e1ch gi<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn C\u00e1c em h\u1ecdc sinh l\u1edbp 8 h\u1eb3n \u0111ang trong qu\u00e1 tr\u00ecnh h\u1ecdc c\u00e1c ki\u1ebfn th\u1ee9c li\u00ean quan \u0111\u1ebfn ph\u00e2n t\u00edch \u0111a th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed? \u0110\u00e2y l\u00e0 m\u1ed9t ki\u1ebfn th\u1ee9c kh\u00f4ng th\u1ec3 thi\u1ebfu trong ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc v\u00e0 b\u1eaft bu\u1ed9c c\u00e1c em ph\u1ea3i n\u1eafm \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c c\u0169ng nh\u01b0 [&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":[9,4],"tags":[],"class_list":["post-877","post","type-post","status-publish","format-standard","hentry","category-toan-hoc","category-trung-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/877","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=877"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/877\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}