{"id":1126,"date":"2026-05-05T06:18:18","date_gmt":"2026-05-05T06:18:18","guid":{"rendered":"https:\/\/79.buffdemo.com\/index.php\/2026\/05\/05\/bo-de-thi-cuoi-ki-2-toan-9\/"},"modified":"2026-05-05T07:59:48","modified_gmt":"2026-05-05T07:59:48","slug":"bo-de-thi-cuoi-ki-2-toan-9","status":"publish","type":"post","link":"https:\/\/79.buffdemo.com\/index.php\/2026\/05\/05\/bo-de-thi-cuoi-ki-2-toan-9\/","title":{"rendered":"B\u1ed9 \u0110\u1ec1 Thi Cu\u1ed1i K\u00ec 2 To\u00e1n 9 Ch\u01b0\u01a1ng Tr\u00ecnh M\u1edbi C\u00f3 \u0110\u00e1p \u00c1n"},"content":{"rendered":"<p>K\u1ef3 thi cu\u1ed1i k\u00ec 2 to\u00e1n 9 s\u1eafp t\u1edbi l\u00e0 c\u01a1 h\u1ed9i l\u1edbn \u0111\u1ec3 b\u1ea1n t\u1ed5ng k\u1ebft ki\u1ebfn th\u1ee9c quan tr\u1ecdng, \u0111\u1eb7c bi\u1ec7t l\u00e0 ph\u1ea7n h\u00ecnh h\u1ecdc kh\u00f4ng gian, ph\u01b0\u01a1ng tr\u00ecnh v\u00e0 th\u1ed1ng k\u00ea. B\u1ea1n c\u1ea7n m\u1ed9t b\u1ed9 \u0111\u1ec1 thi th\u1eed ch\u1ea5t l\u01b0\u1ee3ng, b\u00e1m s\u00e1t c\u1ea3 3 b\u1ed9 s\u00e1ch gi\u00e1o khoa (C\u00e1nh Di\u1ec1u, Ch\u00e2n Tr\u1eddi S\u00e1ng T\u1ea1o, K\u1ebft N\u1ed1i Tri Th\u1ee9c) \u0111\u1ec3 luy\u1ec7n t\u1eadp.<strong> B\u1ed9 \u0110\u1ec1 Thi Cu\u1ed1i K\u00ec 2 To\u00e1n 9<\/strong> n\u00e0y ch\u00ednh l\u00e0 c\u00f4ng c\u1ee5 gi\u00fap b\u1ea1n luy\u1ec7n t\u1eadp, ki\u1ec3m tra ki\u1ebfn th\u1ee9c v\u00e0 t\u0103ng t\u1ed1c \u0111\u1ed9 l\u00e0m b\u00e0i hi\u1ec7u qu\u1ea3. C\u00f9ng <a href=\"https:\/\/tailieuonthi.edu.vn\/\" rel=\"noopener\" target=\"_blank\"><strong>Tailieuonthi EDU<\/strong><\/a> kh\u00e1m ph\u00e1 chi ti\u1ebft nh\u1eefng \u01b0u \u0111i\u1ec3m n\u1ed5i tr\u1ed9i v\u00e0 n\u1ed9i dung c\u1ee7a b\u1ed9 \u0111\u1ec1 thi \u0111\u1eb7c bi\u1ec7t n\u00e0y ngay sau \u0111\u00e2y!<\/p>\n<h2><strong>T\u1ea1i sao n\u00ean s\u1edf h\u1eefu B\u1ed9 \u0110\u1ec1 Thi Cu\u1ed1i K\u00ec 2 To\u00e1n 9?<\/strong><\/h2>\n<p>B\u1ed9 \u0110\u1ec1 Thi Cu\u1ed1i K\u00ec 2 To\u00e1n 9 \u0111\u01b0\u1ee3c nhi\u1ec1u th\u1ea7y c\u00f4 v\u00e0 b\u1ea1n b\u00e8 tin d\u00f9ng v\u00ec nh\u1eefng \u0111i\u1ec3m sau:<\/p>\n<ul>\n<li><strong>Ph\u00f9 h\u1ee3p v\u1edbi m\u1ecdi h\u1ecdc sinh:<\/strong> B\u1ed9 \u0111\u1ec1 bao g\u1ed3m \u0111\u1ec1 thi th\u1eed c\u1ee7a c\u1ea3 3 b\u1ed9 s\u00e1ch gi\u00e1o khoa m\u1edbi (C\u00e1nh Di\u1ec1u, Ch\u00e2n Tr\u1eddi S\u00e1ng T\u1ea1o, K\u1ebft N\u1ed1i Tri Th\u1ee9c). B\u1ea1n h\u1ecdc s\u00e1ch n\u00e0o c\u0169ng c\u00f3 t\u00e0i li\u1ec7u luy\u1ec7n t\u1eadp chu\u1ea9n x\u00e1c, gi\u1ed1ng v\u1edbi \u0111\u1ec1 thi th\u1eadt.<\/li>\n<li><strong>C\u1ea5u tr\u00fac gi\u1ed1ng \u0111\u1ec1 thi th\u1eadt:<\/strong> C\u00e1c \u0111\u1ec1 thi \u0111\u01b0\u1ee3c l\u00e0m theo \u0111\u00fang m\u1eabu \u0111\u1ec1 ki\u1ec3m tra cu\u1ed1i k\u00ec th\u01b0\u1eddng g\u1eb7p: Ph\u1ea7n tr\u1eafc nghi\u1ec7m v\u00e0 ph\u1ea7n t\u1ef1 lu\u1eadn. \u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n l\u00e0m quen v\u1edbi m\u1ecdi ki\u1ec3u c\u00e2u h\u1ecfi.<\/li>\n<li><strong>T\u1eadp trung ki\u1ebfn th\u1ee9c kh\u00f3:<\/strong> B\u1ed9 \u0111\u1ec1 c\u00f3 nhi\u1ec1u b\u00e0i t\u1eadp v\u1ec1 th\u1ed1ng k\u00ea, x\u00e1c su\u1ea5t v\u00e0 h\u00ecnh h\u1ecdc (tr\u1ee5, n\u00f3n, c\u1ea7u). \u0110\u00e2y l\u00e0 nh\u1eefng ph\u1ea7n ki\u1ebfn th\u1ee9c m\u1edbi, d\u1ec5 m\u1ea5t \u0111i\u1ec3m, c\u1ea7n \u0111\u01b0\u1ee3c luy\u1ec7n t\u1eadp k\u1ef9.<\/li>\n<\/ul>\n<h2><strong>N\u1ed9i dung B\u1ed9 \u0110\u1ec1 Thi Cu\u1ed1i K\u00ec 2 To\u00e1n 9<\/strong><\/h2>\n<p>B\u1ed9 <a href=\"https:\/\/tailieuonthi.edu.vn\/lop-9\/toan-9\/\" rel=\"noopener\" target=\"_blank\"><strong>t\u00e0i li\u1ec7u to\u00e1n 9<\/strong><\/a> n\u00e0y c\u00f3 hai ph\u1ea7n quan tr\u1ecdng gi\u00fap b\u1ea1n \u00f4n t\u1eadp v\u00e0 ki\u1ec3m tra:<\/p>\n<h3><strong>Ph\u1ea7n \u0111\u1ec1 b\u00e0i<\/strong><\/h3>\n<p>Ph\u1ea7n \u0111\u1ec1 b\u00e0i s\u1eafp x\u1ebfp c\u00e1c c\u00e2u h\u1ecfi theo nh\u1eefng ch\u1ee7 \u0111\u1ec1 ch\u00ednh c\u1ee7a h\u1ecdc k\u00ec 2:<\/p>\n<ul>\n<li><strong>\u0110\u1ea1i s\u1ed1 (h\u00e0m s\u1ed1 v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh):<\/strong> Luy\u1ec7n t\u1eadp v\u1ebd \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 $y=ax^2$, gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai v\u00e0 \u00e1p d\u1ee5ng \u0111\u1ecbnh l\u00fd Vi-\u00e9t.<\/li>\n<li><strong>Th\u1ed1ng k\u00ea v\u00e0 x\u00e1c su\u1ea5t:<\/strong> Th\u1ef1c h\u00e0nh \u0111\u1ecdc hi\u1ec3u bi\u1ec3u \u0111\u1ed3, l\u1eadp b\u1ea3ng t\u1ea7n s\u1ed1 v\u00e0 t\u00ednh x\u00e1c su\u1ea5t c\u01a1 b\u1ea3n trong c\u00e1c t\u00ecnh hu\u1ed1ng \u0111\u01a1n gi\u1ea3n.<\/li>\n<li><strong>H\u00ecnh h\u1ecdc:<\/strong> Luy\u1ec7n t\u1eadp c\u00e1c b\u00e0i to\u00e1n ch\u1ee9ng minh t\u1ee9 gi\u00e1c n\u1ed9i ti\u1ebfp, v\u00e0 t\u00ednh to\u00e1n di\u1ec7n t\u00edch, th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh tr\u1ee5, h\u00ecnh n\u00f3n, h\u00ecnh c\u1ea7u.<br \/>\nC\u00e1c c\u00e2u h\u1ecfi \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp t\u1eeb d\u1ec5 \u0111\u1ebfn kh\u00f3 (t\u1eeb nh\u1eadn bi\u1ebft c\u00f4ng th\u1ee9c \u0111\u1ebfn th\u00f4ng hi\u1ec3u v\u00e0 v\u1eadn d\u1ee5ng ki\u1ebfn th\u1ee9c), gi\u00fap b\u1ea1n h\u1ecdc theo \u0111\u00fang l\u1ed9 tr\u00ecnh.<\/li>\n<\/ul>\n<h3><strong>Ph\u1ea7n \u0111\u00e1p \u00e1n<\/strong><\/h3>\n<p>T\u1ea5t c\u1ea3 \u0111\u1ec1 thi \u0111\u1ec1u c\u00f3 \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i chi ti\u1ebft k\u00e8m theo.<\/p>\n<ul>\n<li><strong>H\u1ecdc c\u00e1ch gi\u1ea3i \u0111\u00fang:<\/strong> L\u1eddi gi\u1ea3i tr\u00ecnh b\u00e0y t\u1eebng b\u01b0\u1edbc r\u00f5 r\u00e0ng, gi\u00fap b\u1ea1n bi\u1ebft c\u00e1ch suy ngh\u0129 v\u00e0 \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c v\u00e0o b\u00e0i t\u1eadp.<\/li>\n<li><strong>D\u00f2 l\u1ed7i nhanh:<\/strong> B\u1ea1n d\u1ec5 d\u00e0ng so s\u00e1nh b\u00e0i l\u00e0m c\u1ee7a m\u00ecnh v\u1edbi \u0111\u00e1p \u00e1n m\u1eabu \u0111\u1ec3 t\u00ecm ra l\u1ed7i sai v\u00e0 hi\u1ec3u r\u00f5 t\u1ea1i sao m\u00ecnh sai.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" alt=\"\" class=\"aligncenter size-full wp-image-6240\" decoding=\"async\" height=\"1131\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-3.jpg\" srcset=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-3.jpg 800w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-3-212x300.jpg 212w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-3-724x1024.jpg 724w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-3-768x1086.jpg 768w\" width=\"800\"\/> <img loading=\"lazy\" alt=\"\" class=\"aligncenter size-full wp-image-6241\" decoding=\"async\" height=\"1131\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-2.jpg\" srcset=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-2.jpg 800w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-2-212x300.jpg 212w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-2-724x1024.jpg 724w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-2-768x1086.jpg 768w\" width=\"800\"\/> <img alt=\"\" class=\"aligncenter size-full wp-image-6242\" decoding=\"async\" height=\"1131\" loading=\"lazy\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-1.jpg\" srcset=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-1.jpg 800w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-1-212x300.jpg 212w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-1-724x1024.jpg 724w, https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/11\/bo-de-thi-cuoi-ki-2-toan-9-1-768x1086.jpg 768w\" width=\"800\"\/><\/p>\n<h2><strong>T\u1ea3i B\u1ed9 \u0110\u1ec1 Thi Cu\u1ed1i K\u00ec 2 To\u00e1n 9<\/strong><\/h2>\n<p>\u0110\u00e2y ch\u00ednh l\u00e0 b\u1ed9 t\u00e0i li\u1ec7u gi\u00fap b\u1ea1n t\u1ed5ng \u00f4n to\u00e0n di\u1ec7n, luy\u1ec7n t\u1eadp c\u00f3 h\u1ec7 th\u1ed1ng v\u00e0 t\u1ef1 tin \u0111\u1ea1t \u0111i\u1ec3m cao trong k\u1ef3 thi cu\u1ed1i k\u00ec 2. H\u00e3y t\u1ea3i ngay v\u1ec1 m\u00e1y v\u00e0 b\u1eaft \u0111\u1ea7u h\u00e0nh tr\u00ecnh \u00f4n luy\u1ec7n ngay h\u00f4m nay!<\/p>\n<p><a class=\"custom-button\" href=\"https:\/\/drive.google.com\/drive\/folders\/1u9Y7giaXXVa3VW3OQQbRw3HJCIM_Uqf_\" rel=\"nofollow noopener\" target=\"_blank\">T\u1ea3i B\u1ed9 \u0110\u1ec1 Thi Cu\u1ed1i K\u00ec 2 To\u00e1n 9 n\u0103m 2025 (C\u00e1nh Di\u1ec1u)<\/a><\/p>\n<p><a class=\"custom-button\" href=\"https:\/\/drive.google.com\/drive\/folders\/1keMYJqBqVNt9LlK7iY0khIx827HpYsar\" rel=\"nofollow noopener\" target=\"_blank\">T\u1ea3i B\u1ed9 \u0110\u1ec1 Thi Cu\u1ed1i K\u00ec 2 To\u00e1n 9 n\u0103m 2025 (Ch\u00e2n Tr\u1eddi S\u00e1ng T\u1ea1o)<\/a><\/p>\n<p><a class=\"custom-button\" href=\"https:\/\/drive.google.com\/drive\/folders\/1Kvg5XLod6xUuMBj4zr4hg0RyjdVQygST\" rel=\"nofollow noopener\" target=\"_blank\">T\u1ea3i B\u1ed9 \u0110\u1ec1 Thi Cu\u1ed1i K\u00ec 2 To\u00e1n 9 n\u0103m 2025 (K\u1ebft N\u1ed1i Tri th\u1ee9c)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>K\u1ef3 thi cu\u1ed1i k\u00ec 2 to\u00e1n 9 s\u1eafp t\u1edbi l\u00e0 c\u01a1 h\u1ed9i l\u1edbn \u0111\u1ec3 b\u1ea1n t\u1ed5ng k\u1ebft ki\u1ebfn th\u1ee9c quan tr\u1ecdng, \u0111\u1eb7c bi\u1ec7t l\u00e0 ph\u1ea7n h\u00ecnh h\u1ecdc kh\u00f4ng gian, ph\u01b0\u01a1ng tr\u00ecnh v\u00e0 th\u1ed1ng k\u00ea. B\u1ea1n c\u1ea7n m\u1ed9t b\u1ed9 \u0111\u1ec1 thi th\u1eed ch\u1ea5t l\u01b0\u1ee3ng, b\u00e1m s\u00e1t c\u1ea3 3 b\u1ed9 s\u00e1ch gi\u00e1o khoa (C\u00e1nh Di\u1ec1u, Ch\u00e2n Tr\u1eddi [&#8230;]\n","protected":false},"author":1,"featured_media":2324,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[113],"tags":[114],"class_list":["post-1126","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-toan-9","tag-toan-9"],"_links":{"self":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/1126","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/comments?post=1126"}],"version-history":[{"count":1,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/1126\/revisions"}],"predecessor-version":[{"id":2325,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/1126\/revisions\/2325"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/media\/2324"}],"wp:attachment":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/media?parent=1126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/categories?post=1126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/tags?post=1126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}