Answer
$2+4i$
Work Step by Step
Complex number in standard form: $a+bi$
Remember: $i^2=-1$
$-2i^2+4i=-2(-1)+4i=2+4i$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 1 - 1.5 - Complex Numbers - 1.5 Exercises - Page 119: 20
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