Answer
$7y$ should not be multiplied to 1.
Work Step by Step
$7y$ should not be multiplied to 1.
The correct solution is:
$\\\\=7y(3z)-7y(2)+1
\\=21yz-14y+1$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Section 5.4 - Multiplying Polynomials - Exercise Set - Page 290: 95
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