Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 5 - Section 5.6 - Special Products - Exercise Set: 15



Work Step by Step

Using the FOIL method, $(.4-3a)(.2-5a)=(.4)(.2)+(.4)(-5a)+(-3a)(.2)+(-3a)(-5a)=.8+(-2a)+(-.6a)+15a^{2}=.8-2a-.6a+15a^{2}=.8-2.6a+15a^{2}=15a^{2}-2.6a+.8$.
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