Answer :

sairah
[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]3m^2n + 12mn^2=3mn\cdot(m+4n)[/tex]

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