Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 11 - Additional Topics - Chapter 11 Review Problem Set: 42

Answer

$1+2i$

Work Step by Step

Adding the real terms together and the imaginary terms together, we obtain: $(5-7i)+(-4+9i)$ =$(5-4)+(-7i+9i)$ =$1+2i$
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