4m^3n-4m^2n^2+mn^3-mn因式分解

=4m^2n(m-n)+mn(n^2-1)
=mn(4m^2-4mn+n^-1)
=mn(2m-n+1)(2m-n-1)

=mn(4m^2-4mn+n^2-1)=mn{(2m-n)^2-1}=mn(2m-n-1)(2m-n+1)

4m^3n-4m^2n^2+mn^3-mn
=4m^2n(m-n)+mn(n^2-1)
=mn(4m^2-4mn+n^-1)
=mn(2m-n+1)(2m-n-1)
希望你能看懂，祝你学习进步