x²-y²/xy - xy-y²/x(y-x)

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/24 10:08:09

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

=(x²-y²)/xy+y/x
=(x²-y²+y²)/xy
=x/y
再问： =(x²-y²)/xy-y(x-y)/x(y-x) =(x²-y²)/xy+y(x-y)/x(y-x) 别的都没变 -为什么变成+
再答： =(x²-y²)/xy-y(x-y)/x(y-x) =(x²-y²)/xy+y(x-y)/x(x-y) 最后一个y-x应变成x-y

计算：(xy-x²)×x-y/xy x²/xy-x/y [-xy/(x-y)²]²×(y²-xy/x)³ x/xy-y²与y/x²-xy 通分 x-y/x²÷x²-2xy+y²/xy*（xy-x²）计算：x²+2xy+y²/xy-y².x²-2xy+y²/xy+y&# 计算：（xy-x²）乘 x-y分之xy (x+y)(x²-xy+y²）—xy（x+y）因式分解分式（x²-y²\xy）-（xy-y²\xy-x²）可化简为 (xy分之x²-y²)-(xy-x²分之xy-y²) X²+2xy+y²/xy乘x²-2xy+y²/xy+y²= (xy-x²）²÷（x-y)²/xy·x-y/x² 计算