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: 27

Answer

$9a^2-30a+25$

Work Step by Step

RECALL: $(x-y) ^2=x^2 -2xy +y^2$ Use the rule above to obtain: $=(3a)^2-2(3a)(5) + 5^2 \\=9a^2-30a+25$
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