Answer
$\frac{x-1}{x^2+9}$
Work Step by Step
$\frac{x^2-1}{x^3+x^2+9x+9}=\frac{(x+1)(x-1)}{(x+1)(x^2+9)}=\frac{x-1}{x^2+9}$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Prerequisites - P.5 - Rational Expressions - Exercises - Page 48: 30
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