Answer
$x=\pm 4i$
Work Step by Step
$x^{2}+16=0$
$ x^{2}=-16$
$x=\pm\sqrt{-16}=\pm 4i$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 1, Equations and Graphs - Chapter 1 Review - Exercises - Page 170: 69
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