Answer
$\frac{1}{x-9}$
Work Step by Step
$\frac{x+9}{x^{2}-81}=\frac{x+9}{x^{2}-9^{2}}=\frac{x+9}{(x-9)(x+9)}=\frac{1}{x-9}$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 12 - Cumulative Review - Page 912: 3
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