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: 26

Answer

$20a^2-3a-56$

Work Step by Step

RECALL For any real numbers a, b, and c: $a(b+c)=ab + ac \\AND \\a(b-c) =ac-bc$ Use the distributive property (which is shown above) to obtain: $=4a(5a+8) -7(5a+8) \\=4a(5a) + 4a(8) -7(5a) - 7(8) \\=20a^2+32a-35a-56 \\=20a^2-3a-56$
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