Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 5 - Exponents and Polynomials - Chapter 5 Review Problem Set - Page 231: 33



Work Step by Step

RECALL: $(x+y) ^2=x^2 +2xy +y^2$ Use the formula above where $x=2a$ and $y=7$ to obtain: $=(2a)^2+2(2a)(7) +7^2 \\=4a^2+28a+49$
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