Answer
$(x+7)(x+7)$
Work Step by Step
$x^2+14x+49=x^2+7x+7x+49=x(x+7)+7(x+7)=(x+7)(x+7)$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 5 - Section 5.4 - Factoring Trinomials - Exercise Set - Page 363: 141
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