因式分解 :x^2(x-y)+y^2(x-y) m^2n-mn^2+mnx^2(x-y)+y^2(x-y)m^2n-mn^2+mn

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因式分解 :x^2(x-y)+y^2(x-y) m^2n-mn^2+mnx^2(x-y)+y^2(x-y)m^2n-mn^2+mn

因式分解 :x^2(x-y)+y^2(x-y) m^2n-mn^2+mnx^2(x-y)+y^2(x-y)m^2n-mn^2+mn
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

因式分解 :x^2(x-y)+y^2(x-y) m^2n-mn^2+mnx^2(x-y)+y^2(x-y)m^2n-mn^2+mn
x^2(x-y)+y^2(x-y)=(x^2+y^2)(x-y)
m^2n-mn^2+mn =mn(m-n+1)