展開 (16+x)(16-x)
展開 (1-9m)^2
展開 (3p+11q)^2
因式分解 12ac-14bc-6ad+7bd
因式分解 50w^2-98
因式分解 -64c^2-16cd-d^2
因式分解 9k^2-60kl+100l^2
(a-2b)^2-a^2
(r+3s)(r^2-3rs+9s^2)
(a+b)^4-4(a+b)^2
中二 因式分解
2010-09-17 6:32 am
回答 (2)
2010-09-17 7:05 am
2010-09-17 6:57 am
(16+x)(16-x)
=256-x^2
(1-9m)^2
=1-18m+81m^2
(3p+11q)^2
=9p^2+66pq+121q^2
12ac-14bc-6ad+7bd
=2c(6a-7b)-d(6a-7b)
=(2c-d)(6a-7b)
50w^2-98
=2(25w^2-49)
=2(5w+7)(5w-7)
-64c^2-16cd-d^2
=-(64c^2+16cd+d^2)
=-(8c+d)^2
9k^2-60kl+100l^2
=(3k-10l)^2
(a-2b)^2-a^2
=(a-2b+a)(a-2b-a)
=(2a-2b)(-2b)
=-4(a-b)b
=256-x^2
(1-9m)^2
=1-18m+81m^2
(3p+11q)^2
=9p^2+66pq+121q^2
12ac-14bc-6ad+7bd
=2c(6a-7b)-d(6a-7b)
=(2c-d)(6a-7b)
50w^2-98
=2(25w^2-49)
=2(5w+7)(5w-7)
-64c^2-16cd-d^2
=-(64c^2+16cd+d^2)
=-(8c+d)^2
9k^2-60kl+100l^2
=(3k-10l)^2
(a-2b)^2-a^2
=(a-2b+a)(a-2b-a)
=(2a-2b)(-2b)
=-4(a-b)b
收錄日期: 2021-04-13 17:31:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100916000051KK01415