分式计算,(xy-x²)÷(x-y)/(xy)
问题描述:
分式计算,(xy-x²)÷(x-y)/(xy)
答
(xy-x²)÷(x-y)/(xy)
=x(y-x) ÷ (x-y)/xy
=x(y-x) * xy/(x-y)
=-x²y