Answer
-9
Work Step by Step
To determine what must be excluded from the domain, we set the denominator equal to 0.
x + 9 = 0
Subtracting 9 from both sides, we find x = -9 makes the denominator 0. Thus, -9 must be excluded.
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.6 - Page 86: 2
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