Answer
$x^2+4=0$
Work Step by Step
$x=2i$, $x=-2i$
$x-2i=0$
$x+2i=0$
$(x-2i)(x+2i)=0$
$x^2-4i^2=0,i^2=-1$
$x^2+4=0$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 1 - 1.6 - Other Types of Equations - 1.6 Exercises - Page 129: 90
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