x平方-2xy+y平方-1/x-y-1,化简!

问题描述:

x平方-2xy+y平方-1/x-y-1,化简!
1个回答 分类:数学 2014-10-04

问题解答:

我来补答
(x^2-2xy+y^2-1)/(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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