Answer
$15a^{2}-2.6a+.8$
Work Step by Step
Using the FOIL method, $(.4-3a)(.2-5a)=(.4)(.2)+(.4)(-5a)+(-3a)(.2)+(-3a)(-5a)=.8+(-2a)+(-.6a)+15a^{2}=.8-2a-.6a+15a^{2}=.8-2.6a+15a^{2}=15a^{2}-2.6a+.8$.
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 5 - Section 5.6 - Special Products - Exercise Set - Page 387: 15
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