Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 5 - Review - Page 232: 25



Work Step by Step

We simplify by distributing 5a as follows: $$5a(3a+4b)=5a(3a)+5a(4b)=15a^2+20ab.$$
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