问题描述: 化简(x平方-y平方)/(x+y)+(x平方-2xy+y平方)/(x-y) 1个回答 分类:数学 2014-11-24 问题解答: 我来补答 (x平方-y平方)/(x+y)+(x平方-2xy+y平方)/(x-y)=(x+y)(x-y)/(x+y)+(x-y)^2/(x-y)=x-y+x-y=2(x-y) 展开全文阅读