{"id":232,"date":"2026-08-03T15:58:17","date_gmt":"2026-08-03T06:58:17","guid":{"rendered":"https:\/\/www.masmath.online\/?p=232"},"modified":"2026-08-03T15:58:17","modified_gmt":"2026-08-03T06:58:17","slug":"%e5%b1%95%e9%96%8b%e3%81%9d%e3%81%ae4","status":"publish","type":"post","link":"https:\/\/www.masmath.online\/?p=232","title":{"rendered":"\u5c55\u958b\u305d\u306e4"},"content":{"rendered":"\n

\u5c55\u958b<\/h2>\n\n
\n\u516c\u5f0f\u306e\u78ba\u8a8d<\/strong>
\n\\( (a+b)^2=a^2+2ab+b^2 \\)
\n\\( (a-b)^2=a^2-2ab+b^2 \\)
\n\\( (a+b)(a-b)=a^2-b^2 \\)
\n\\( (x+a)(x+b)=x^2+(a+b)x+ab \\)
\n\\( (ax+b)(cx+d)=acx^2+(ad+bc)x+bd \\)
\n\\( (a+b+c)^2=a^2+b^2+c^2+2ab+2bc+2ca \\)
\n\\( (a+b)^3=a^3+3a^2b+3ab^2+b^3 \\)
\n\\( (a-b)^3=a^3-3a^2b+3ab^2-b^3 \\)
\n\\( (a+b)(a^2-ab+b^2)=a^3+b^3 \\)
\n\\( (a-b)(a^2+ab+b^2)=a^3-b^3 \\)\n<\/div>\n\n

\u554f\u984cA<\/h2>\n

\u6b21\u306e\u5f0f\u3092\u5c55\u958b\u305b\u3088\uff0e<\/p>\n

\n\\( (1) \\)\u3000\\( (x+3)^2 \\)
\n\\( (2) \\)\u3000\\( (x-5)^2 \\)
\n\\( (3) \\)\u3000\\( (x+7)(x-7) \\)
\n\\( (4) \\)\u3000\\( (x+2)(x+6) \\)
\n\\( (5) \\)\u3000\\( (2x+3)(3x-1) \\)
\n\\( (6) \\)\u3000\\( (x+y+1)^2 \\)
\n\\( (7) \\)\u3000\\( (x+2)^3 \\)
\n\\( (8) \\)\u3000\\( (x-3)^3 \\)
\n\\( (9) \\)\u3000\\( (x+2)(x^2-2x+4) \\)\n<\/p>\n\n

\u554f\u984cA\u306e\u89e3\u7b54<\/h2>\n

\n\\( (1) \\)\u3000\\( (x+3)^2=x^2+6x+9 \\)
\n\\( (2) \\)\u3000\\( (x-5)^2=x^2-10x+25 \\)
\n\\( (3) \\)\u3000\\( (x+7)(x-7)=x^2-49 \\)
\n\\( (4) \\)\u3000\\( (x+2)(x+6)=x^2+8x+12 \\)
\n\\( (5) \\)\u3000\\( (2x+3)(3x-1)=6x^2+7x-3 \\)
\n\\( (6) \\)\u3000\\( (x+y+1)^2=x^2+y^2+1+2xy+2y+2x \\)
\n\\( (7) \\)\u3000\\( (x+2)^3=x^3+6x^2+12x+8 \\)
\n\\( (8) \\)\u3000\\( (x-3)^3=x^3-9x^2+27x-27 \\)
\n\\( (9) \\)\u3000\\( (x+2)(x^2-2x+4)=x^3+8 \\)\n<\/p>\n\n

\n\n

\u554f\u984cB<\/h2>\n

\u6b21\u306e\u5f0f\u3092\u5c55\u958b\u305b\u3088\uff0e<\/p>\n

\n\\( (1) \\)\u3000\\( (x+4)^2 \\)
\n\\( (2) \\)\u3000\\( (x-6)^2 \\)
\n\\( (3) \\)\u3000\\( (x+9)(x-9) \\)
\n\\( (4) \\)\u3000\\( (x+3)(x-5) \\)
\n\\( (5) \\)\u3000\\( (3x+2)(2x-5) \\)
\n\\( (6) \\)\u3000\\( (x+y+3)^2 \\)
\n\\( (7) \\)\u3000\\( (x+3)^3 \\)
\n\\( (8) \\)\u3000\\( (x-2)^3 \\)
\n\\( (9) \\)\u3000\\( (x-3)(x^2+3x+9) \\)\n<\/p>\n\n

\u554f\u984cB\u306e\u89e3\u7b54<\/h2>\n

\n\\( (1) \\)\u3000\\( (x+4)^2=x^2+8x+16 \\)
\n\\( (2) \\)\u3000\\( (x-6)^2=x^2-12x+36 \\)
\n\\( (3) \\)\u3000\\( (x+9)(x-9)=x^2-81 \\)
\n\\( (4) \\)\u3000\\( (x+3)(x-5)=x^2-2x-15 \\)
\n\\( (5) \\)\u3000\\( (3x+2)(2x-5)=6x^2-11x-10 \\)
\n\\( (6) \\)\u3000\\( (x+y+3)^2=x^2+y^2+9+2xy+6y+6x \\)
\n\\( (7) \\)\u3000\\( (x+3)^3=x^3+9x^2+27x+27 \\)
\n\\( (8) \\)\u3000\\( (x-2)^3=x^3-6x^2+12x-8 \\)
\n\\( (9) \\)\u3000\\( (x-3)(x^2+3x+9)=x^3-27 \\)\n<\/p>\n\n

\n\n

\u554f\u984cC<\/h2>\n

\u6b21\u306e\u5f0f\u3092\u5c55\u958b\u305b\u3088\uff0e<\/p>\n

\n\\( (1) \\)\u3000\\( (x+7)^2 \\)
\n\\( (2) \\)\u3000\\( (x-2)^2 \\)
\n\\( (3) \\)\u3000\\( (x+5)(x-5) \\)
\n\\( (4) \\)\u3000\\( (x-3)(x-8) \\)
\n\\( (5) \\)\u3000\\( (4x+1)(2x-3) \\)
\n\\( (6) \\)\u3000\\( (a-b+3)^2 \\)
\n\\( (7) \\)\u3000\\( (x+1)^3 \\)
\n\\( (8) \\)\u3000\\( (2x-1)^3 \\)
\n\\( (9) \\)\u3000\\( (x+4)(x^2-4x+16) \\)\n<\/p>\n\n

\u554f\u984cC\u306e\u89e3\u7b54<\/h2>\n

\n\\( (1) \\)\u3000\\( (x+7)^2=x^2+14x+49 \\)
\n\\( (2) \\)\u3000\\( (x-2)^2=x^2-4x+4 \\)
\n\\( (3) \\)\u3000\\( (x+5)(x-5)=x^2-25 \\)
\n\\( (4) \\)\u3000\\( (x-3)(x-8)=x^2-11x+24 \\)
\n\\( (5) \\)\u3000\\( (4x+1)(2x-3)=8x^2-10x-3 \\)
\n\\( (6) \\)\u3000\\( (a-b+3)^2=a^2+b^2+9-2ab+6a-6b \\)
\n\\( (7) \\)\u3000\\( (x+1)^3=x^3+3x^2+3x+1 \\)
\n\\( (8) \\)\u3000\\( (2x-1)^3=8x^3-12x^2+6x-1 \\)
\n\\( (9) \\)\u3000\\( (x+4)(x^2-4x+16)=x^3+64 \\)\n<\/p>\n\n

\n\n

\u554f\u984cD<\/h2>\n

\u6b21\u306e\u5f0f\u3092\u5c55\u958b\u305b\u3088\uff0e<\/p>\n

\n\\( (1) \\)\u3000\\( (x+9)^2 \\)
\n\\( (2) \\)\u3000\\( (x-7)^2 \\)
\n\\( (3) \\)\u3000\\( (2x+3)(2x-3) \\)
\n\\( (4) \\)\u3000\\( (x-6)(x+2) \\)
\n\\( (5) \\)\u3000\\( (5x-2)(x+3) \\)
\n\\( (6) \\)\u3000\\( (x+2y-1)^2 \\)
\n\\( (7) \\)\u3000\\( (2x+1)^3 \\)
\n\\( (8) \\)\u3000\\( (x-5)^3 \\)
\n\\( (9) \\)\u3000\\( (2x-1)(4x^2+2x+1) \\)\n<\/p>\n\n

\u554f\u984cD\u306e\u89e3\u7b54<\/h2>\n

\n\\( (1) \\)\u3000\\( (x+9)^2=x^2+18x+81 \\)
\n\\( (2) \\)\u3000\\( (x-7)^2=x^2-14x+49 \\)
\n\\( (3) \\)\u3000\\( (2x+3)(2x-3)=4x^2-9 \\)
\n\\( (4) \\)\u3000\\( (x-6)(x+2)=x^2-4x-12 \\)
\n\\( (5) \\)\u3000\\( (5x-2)(x+3)=5x^2+13x-6 \\)
\n\\( (6) \\)\u3000\\( (x+2y-1)^2=x^2+4y^2+1+4xy-4y-2x \\)
\n\\( (7) \\)\u3000\\( (2x+1)^3=8x^3+12x^2+6x+1 \\)
\n\\( (8) \\)\u3000\\( (x-5)^3=x^3-15x^2+75x-125 \\)
\n\\( (9) \\)\u3000\\( (2x-1)(4x^2+2x+1)=8x^3-1 \\)\n<\/p>\n\n

\n\n

\u554f\u984cE<\/h2>\n

\u6b21\u306e\u5f0f\u3092\u5c55\u958b\u305b\u3088\uff0e<\/p>\n

\n\\( (1) \\)\u3000\\( (x+6)^2 \\)
\n\\( (2) \\)\u3000\\( (x-9)^2 \\)
\n\\( (3) \\)\u3000\\( (3x+4)(3x-4) \\)
\n\\( (4) \\)\u3000\\( (x+4)(x-11) \\)
\n\\( (5) \\)\u3000\\( (2x+5)(3x-4) \\)
\n\\( (6) \\)\u3000\\( (2a-b+1)^2 \\)
\n\\( (7) \\)\u3000\\( (x-4)^3 \\)
\n\\( (8) \\)\u3000\\( (3x+1)^3 \\)
\n\\( (9) \\)\u3000\\( (x^2+x+1)(x^2-x+1) \\)\n<\/p>\n\n

\u554f\u984cE\u306e\u89e3\u7b54<\/h2>\n

\n\\( (1) \\)\u3000\\( (x+6)^2=x^2+12x+36 \\)
\n\\( (2) \\)\u3000\\( (x-9)^2=x^2-18x+81 \\)
\n\\( (3) \\)\u3000\\( (3x+4)(3x-4)=9x^2-16 \\)
\n\\( (4) \\)\u3000\\( (x+4)(x-11)=x^2-7x-44 \\)
\n\\( (5) \\)\u3000\\( (2x+5)(3x-4)=6x^2+7x-20 \\)
\n\\( (6) \\)\u3000\\( (2a-b+1)^2=4a^2+b^2+1-4ab+4a-2b \\)
\n\\( (7) \\)\u3000\\( (x-4)^3=x^3-12x^2+48x-64 \\)
\n\\( (8) \\)\u3000\\( (3x+1)^3=27x^3+27x^2+9x+1 \\)
\n\\( (9) \\)\u3000\\( (x^2+x+1)(x^2-x+1)=x^4+x^2+1 \\)\n<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5c55\u958b \u516c\u5f0f\u306e\u78ba\u8a8d \\( (a+b)^2=a^2+2ab+b^2 \\) \\( (a-b)^2=a^2-2ab+b^2 \\) \\( (a+b)(a-b)=a^2-b^2 \\) \\( (x+a)(x+b)=x^2+(a+b)x<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jin_ogp_image_url":"","_jin_last_featured_id":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-232","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.masmath.online\/index.php?rest_route=\/wp\/v2\/posts\/232","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.masmath.online\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.masmath.online\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.masmath.online\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.masmath.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=232"}],"version-history":[{"count":1,"href":"https:\/\/www.masmath.online\/index.php?rest_route=\/wp\/v2\/posts\/232\/revisions"}],"predecessor-version":[{"id":233,"href":"https:\/\/www.masmath.online\/index.php?rest_route=\/wp\/v2\/posts\/232\/revisions\/233"}],"wp:attachment":[{"href":"https:\/\/www.masmath.online\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.masmath.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.masmath.online\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}