4m(m-n)^2+4n(n-m)^3
问题描述:
4m(m-n)^2+4n(n-m)^3
答
4m(m-n)^2+4n(n-m)^3
=4m(n-m)^2+4n(n-m)^3
=4(n-m)^2(m+n(n-m))
=4(n-m)^2(n^2-nm+m)