Answer
See graph, $0, 2.15$
Work Step by Step
Step 1. See graph for $f(x)=x^2-2sin(2x)-3x$
Step 2. We can identify the x-intercept(s) or solution(s) as $x=0$ and $x\approx2.15$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 7 - Analytic Trigonometry - 7.3 Trigonometric Equations - 7.3 Assess Your Understanding - Page 467: 91
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