Question

(m-n)³+n(m-n)²-n(n-m)³因式分解 求大神解答··

Answer 1

(m-n)³+n(m-n)²-n(n-m)³=(m-n)³+n(m-n)²+n(m-n)³=(m-n)²[m-n+n+n(m-n)]=(m-n)²(m-n+n+nm-n²)=(m-n)²(m+nm-n²)