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化简:x-y-1分之x的平方-2xy+y的平方-1
人气:497 ℃ 时间:2019-10-11 21:43:08
解答
樱桃_小纯子:
(x²-2xy+y²-1)/(x-y-1)
=[(x-y)²-1]/(x-y-1)
=[(x-y+1)(x-y-1)]/(x-y-1)
=x-y+1
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