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: 21

Answer

$x^2+17x+72$

Work Step by Step

RECALL: For any real numbers a, b, and c: $a(b+c)=ab + ac$ Use the distributive property (which is shown above) to obtain: $=x(x+8) + 9(x+8) \\=x(x) + x(8) + 9(x) + 9(8) \\=x^2+8x+9x+72 \\=x^2+(8+9)x+72 \\=x^2+17x+72$
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