问题描述: (3a/x+y)的三次方乘以(x二次方-y二次方)除以(y-x/y+x)二次方 1个回答 分类:数学 2014-11-07 问题解答: 我来补答 (3a/x+y)³*(x²-y²)/(y-x/y+x)²=(3a)³/(x+y)³*(x+y)*(x-y)*(x+y)²/(x-y)²=(3a)³/(x-y) 展开全文阅读