【x+3y】^2-x-3y ab[x-y]^2+b - 知识问答

【x+3y】^2-x-3y ab[x-y]^2+b[y-x]^3 分解因式

1个回答

(1) (x+3y)^2-x-3y
=(x+3y)^2-(x+3y)
=(x+3y)(x+3y-1)
(2) ab(x-y)^2+b(y-x)^3
=ab(x-y)^2-b(x-y)^3
=b(x-y)^2[a-(x-y)]
=b(x-y)^2(a-x+y)

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