College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter 1 - Section 1.3 - Complex Numbers - 1.3 Exercises - Page 104: 81



Work Step by Step

Plug in the given values to the formula $E=IZ$. $E=(5+7i)(6+4i)$ Expand. $E=30+20i+42i+28i^2$ Note $i^2=-1$ and combine like terms. $E=(30-28)+(20+42)i$ $E=2+62i$
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