Precalculus: Mathematics for Calculus, 7th Edition

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: 49

Answer

(-2,2)

Work Step by Step

$x^{2}$ $\lt$ 4 $x^{2}$ - 4 $\lt$ 0 (x-2)(x+2) $\lt$ 0 Factors are zero when x=+or-2, endpoints don't satisfy the inequality, plug in values from intervals to decide which of them satisfy the inequality.
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