Answer
$x=±6i$
Work Step by Step
$x^{2}=-36$
$x=±\sqrt -36$
$x=±(\sqrt 36\times\sqrt -1)$
$x=±6i$
We know that $\sqrt 36=6$, because $6^{2}=36$.
We know that $\sqrt -1=i$, because $-1^{2}=i$.
Trigonometry (11th Edition) Clone
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
978-0-13-421743-7
ISBN 13:
978-0-13421-743-7
Chapter 8 - Complex Numbers, Polar Equations, and Parametric Equations - Section 8.1 Complex Numbers - 8.1 Exercises - Page 364: 86
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