Answer
$\pm2,\pm5i$
Work Step by Step
Step 1. Factor the equation to get $(x^2-4)(x^2+25)=0$
Step 2. For $x^2=4$, we have $x=\pm2$
Step 3. For $x^2=-25$, we have $x=\pm5i$
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 - 7.2 The Inverse Trigonometric Functions (Continued) - 7.2 Assess Your Understanding - Page 459: 87
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