Answer
$$ 7+4i$$
Work Step by Step
A good way to consider imaginary numbers is to treat the real components as like terms and to treat the imaginary components as like terms. Then, combining like terms, we find:
$$ 7+(3+1)i \\ 7+4i$$
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: 23
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