Answer
$49a^2+14a+1$
Work Step by Step
Use the FOIL method.
$(7a+1)^2=(7a+1)(7a+1)=49a^2+7a+7a+1=49a^2+14a+1$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 10 - Review - Page 727: 30
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