x^/y-x-y^/y-x化简.
问题描述：
x^/y-x-y^/y-x化简.
答
亲，能把题目拍下来吗
答
原式
=(x²-y²)/(y-x)
=(x+y)(x-y)/[-(x-y)]
=-(x+y)
=-x-y