(x/x-y)-(y/x+y)+(2xy/x^2-y^2)

题目详情

▼优质解答

答案和解析

原式=x(x+y)/(x+y)(x-y)-y(x-y)/(x+y)(x-y)+2xy/(x+y)(x-y)
=(x²+xy-xy+y²+2xy)/(x+y)(x-y)
=(x²+2xy+y²)/(x+y)(x-y)
=(x+y)²/(x+y)(x-y)
=(x+y)/(x-y)

看了 (x/x-y)-(y/x+y...的网友还看了以下：

相关搜索：x/x-y 2-y y y/x 2 2xy/x -