Answer
$(-\infty,-2]\cup[2,\infty)$.
Work Step by Step
Step 1. See graph for $f(x)=-2(x+2)(x-2)^3$.
Step 2. We can identify the solution for $f(x)\le0$: $(-\infty,-2]\cup[2,\infty)$.
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 3 - Polynomial and Rational Functions - Section 3.6 Polynomial and Rational Inequalities - 3.6 Assess Your Understanding - Page 263: 13
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