问题描述: 计算:x²-y²/x·-x²/(x-y)²;8y²y³·(-3x/4y²). 1个回答 分类:数学 2014-09-27 问题解答: 我来补答 (x²-y²)/x·(-x²)/(x-y)²=(x+y)(x-y) ·(-x)/(x-y)²=-x(x+y)/(x-y).8y²y³·(-3x/4y²)=2y³·(-3x)=-6x·y³ 展开全文阅读