Answer
4
Work Step by Step
$(8+\sqrt {-18})-(4+3\sqrt {2}i)=(8+3\sqrt {2}i)-(4+3\sqrt {2}i)$
where i = $\sqrt {-1}$
$(8-4) + (3\sqrt {2}i-3\sqrt {2}i)=4+0i=4$
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: 28
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