How do you factor 3a3b+21a2b4? Algebra Polynomials and Factoring Factoring Completely 1 Answer Typo Jun 26, 2018 3a2b(a+7b3) Explanation: 3a3b+21a2b4 =3(a3b+7a2b4) =3a2(ab+7b4) =3a2b(a+7b3) Answer link Related questions What is Factoring Completely? How do you know when you have completely factored a polynomial? Which methods of factoring do you use to factor completely? How do you factor completely 2x2−8? Which method do you use to factor 3x(x−1)+4(x−1)? What are the factors of 12x3+12x2+3x? How do you find the two numbers by using the factoring method, if one number is seven more than... How do you factor 12c2−75 completely? How do you factor x6−26x3−27? How do you factor 100x2+180x+81? See all questions in Factoring Completely Impact of this question 1880 views around the world You can reuse this answer Creative Commons License