Answer
$9y^{2}+28y+4$
Work Step by Step
$(7y+2)^{2}=(7y+2)(7y+2)=7y(7y+2)+2(7y+2)=(7y)(7y)+(7y)(2)+(2)(7y)+(2)(2)=49y^{2}+14y+14y+4=49y^{2}+28y+4$
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 5.5 - Multiplying Polynomials - Exercise Set - Page 379: 68
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