因式分解:3n^2-4mn+m^2

问题描述:

因式分解:3n^2-4mn+m^2

(3n-m)(n-m)

(3n-m)(n-m)

=(3n-m)(n-m)

(n-m)(3n-m)

3n^2-4mn+m^2
=(3n-m)(n-m)