Answer
See below.
Work Step by Step
First, we must sum the real numbers, and then we must sum the imaginary numbers.
E.g.: $(x+i)+(x+2i)=(x+x)+(i+2i)=2x+3i$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter 1 - Equations and Inequalities - Exercise Set 1.4 - Page 143: 57
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