Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 8 - Section 8.1 - Complex Numbers - 8.1 Problem Set - Page 426: 81



Work Step by Step

$z_{3}(z_{1}+z_{2})$ =$(4+5i)[(2+3i)+(2-3i)]$ =$(4+5i)(2+2+3i-3i)$ =$(4+5i)(4)$ =$16+20i$
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