4m^3n-4m^2n^2+mn^3-mn因式分解
问题描述:
4m^3n-4m^2n^2+mn^3-mn因式分解
答
=4m^2n(m-n)+mn(n^2-1)
=mn(4m^2-4mn+n^-1)
=mn(2m-n+1)(2m-n-1)