1)26a^2 b^2+39bc
2)9b^2 -1
3)2x^2-32y^2
4)169-4x^2
5)x^4 -1
6)(m+n)^2 -1
7)17m^2 -12mn--5n^2
8)2x^2 -24x+54
因式分解f.3
2008-01-02 1:34 am
回答 (1)
2008-01-02 2:11 am
✔ 最佳答案
1)26a^2 b^2+39bc=13b(2 a^2 b+3c)2)9b^2 -1=(3b+1)(3b-1)
3)2x^2-32y^2=2(x+4y)(x-4y)
4)169-4x^2=(13+2x)(13-2x)
5)x^4 -1=(x^2+1)(x+1)(x-1)
6)(m+n)^2 -1=(m+n+1)(m+n-1)
7)17m^2 -12mn--5n^2 =(17m+5n)(m-n)
8)2x^2 -24x+54 =2(x-3)(x-9)
收錄日期: 2021-04-12 14:36:48
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https://hk.answers.yahoo.com/question/index?qid=20080101000051KK02833