Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 6 - Section 6.1 - Rational Expressions and Functions; Multiplying and Dividing - 6.1 Exercises: 58

Answer

$-(x+9)$

Work Step by Step

$\frac{x^{2}-81}{9-x}=\frac{(x+9)(x-9)}{9-x}=\frac{(x+9)(x-9)}{-(x-9)}=\frac{x+9}{-1}\times\frac{x-9}{x-9}=-(x+9)\times1=-(x+9)$
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