问题描述: x^2-y^2/x+y-4x(x-y)+y^2/2x-y,过程有就OK 1个回答 分类: 数学 2014-10-13 问题解答: 我来补答 (x^2-y^2)/(x+y)-(4x(x-y)+y^2)/(2x-y)=(x-y)(x+y)/(x+y)-(4x^2-4xy+y^2)/(2x-y)=(x-y)-(2x-y)^2/(2x-y)=(x-y)-(2x-y)=-x 展开全文阅读