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分解因式x(x-y)²-2y(y-x)
人气:253 ℃ 时间:2020-02-03 21:48:24
解答
x(x-y)²-2y(y-x)
=x(x-y)²+2y(x-y)
=(x-y)[x(x-y)+2y]
=(x-y)(x²-xy+2y)
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