# Chapter R - Section R.4 - Factoring Polynomials - R.4 Exercises: 31

2a(2a - 3)(3a + 7)

#### Work Step by Step

1. Factor out GCF: 2a(6$a^{2}$ + 5a - 21) 2. Factor expression inside parentheses: 2a(2a - 3)(3a + 7) 3. Check: 2a(2a - 3)(3a + 7) = 12$a^{3}$ + 10$a^{2}$ - 42a

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.