因式分解(5x-3y)^2-(3x-5y)^2
1
(5x-3y)^2-(3x-5y)^2
2
(a+2b)^2-4(a-b)^2
3
(x+y)^2-4(x+y)+4
4
a^2-ab+b^2/4
人气:184 ℃ 时间:2019-10-11 18:04:42
解答
(1)(5x-3y)^2-(3x-5y)^2 =[(5x-3y)+(3x-5y)][(5x-3y)-(3x-5y)]=(8x-8y)(2x+2y)=16(x+y)(x-y)(2)(a+2b)^2-4(a-b)^2=(a+2b)^2-[2(a-b)]^2=[(a+2b)+2(a-b)][(a+2b)-2(a-b)]=3a(-a+4b) (3)(x+y)^2-4(x+y)+4=[(x+y)-2]^2=...
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