Answer :
[tex]3m^{2}n + 12mn^{2} [/tex]
[tex]3mn( m + 4n)[/tex]
So, [tex]3mn[/tex] is the greatest common factor of [tex]3m^{2}n + 12mn^{2} [/tex]
[tex]3mn( m + 4n)[/tex]
So, [tex]3mn[/tex] is the greatest common factor of [tex]3m^{2}n + 12mn^{2} [/tex]