Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 2 - Section 2.7 - Polynomial and Rational Inequalities - Exercise Set - Page 414: 88

Answer

$(-2,-1)\cup(2,\infty)$
1582379596

Work Step by Step

Step 1. Graph the function $f(x)=x^3+x^2-4x-4$ as shown in the figure. Step 2. The zeros of the function can be identified as $x=-2,-1,2$ Step 3. We can identify the regions where $f(x)\gt0$ as $(-2,-1)\cup(2,\infty)$
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