(x的平方-y的平方)(x-y)的平方-(x-y) - 知识问答

(x的平方-y的平方)(x-y)的平方-(x-y)的四次方

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(x²-y²)(x-y)²-(x-y)的4次方
=(x+y)(x-y)(x-y)²-(x-y)的4次方
=(x+y)(x-y)³-(x-y)的4次方
=[(x+y)-(x-y)](x-y)³
=2y(x-y)³
明白请采纳,
有新问题请求助,

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