Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 4 - Polynomial and Rational Functions - 4.4 Polynomial and Rational Inequalities - 4.4 Assess Your Understanding - Page 219: 29

Answer

$(-\infty,-1)U(1,\infty)$

Work Step by Step

Step 1.Factor and identify boundary points (zeros) $x^2(x+1)(x-1)\gt0$ as $x=-1,0,1$ which divide the x-axis into four intervals $(-\infty,-1),(-1,0),(0,1),(1,\infty)$ Step 2. Choose test values in each interval $x=-2,-0.5,0.5,2$ and test the inequality to get $True, \ False,\ False, \ True$ Step 3. Thus the solution intervals are $(-\infty,-1)U(1,\infty)$
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