Answer
x$\geq$3 and x$\leq$-3
Work Step by Step
$x^{2}$-9$\geq$0
$x^{2}$$\geq$9
|x|$\geq$3
x$\geq$3 and x$\leq$-3
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 1 - Section 1.8 - Inequalities - 1.8 Exercises - Page 89: 101
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