Andrew M. answered 02/24/18
Tutor
New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors
3m2(2mn-4mn2+6n)
= 3m2(2mn) + 3m2(-4mn2) + 3m2(6n)
= 6m2+1n - 12m2+1n2 + 18m2n
= 6m3n - 12m3n2 + 18m2n