用提公因式法计算：x(x-y)²-y(y-x)²
问题描述：
用提公因式法计算：x(x-y)²-y(y-x)²
答
提公因式法计算：x(x-y)²-y(y-x)²
=x(x-y)²-y(x-y)²
=(x-y)^2(x-y)
=(x-y)^3