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(x-y)(x²+y²-2xy)+2(y-x)²因式分解
人气:275 ℃ 时间:2019-08-09 19:20:27
解答
(x-y)(x²+y²-2xy)+2(y-x)²
=(x-y)(x-y)²+2(x-y)²
=(x-y)²(x-y+2)
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