因式分解 ：x^2(x-y)+y^2(x-y) m^2n-mn^2+mn
问题描述：
因式分解 ：x^2(x-y)+y^2(x-y) m^2n-mn^2+mn
x^2(x-y)+y^2(x-y)
m^2n-mn^2+mn
答
x^2(x-y)+y^2(x-y)=(x^2+y^2)(x-y)
m^2n-mn^2+mn =mn(m-n+1)要过程。这不就是全部过程了吗