Answer
$ i\sqrt {15}$
Work Step by Step
$\sqrt {-15} = \sqrt {-1} \sqrt {15} = i\sqrt {15}$
Because $\sqrt {-1} = i$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 1 - Equations and Inequalities - 1.3 Complex Numbers - 1.3 Exercises - Page 111: 24
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