Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 4 - Quadratic Functions and Equations - 4-8 Complex Numbers - Practice and Problem-Solving Exercises - Page 254: 67

Answer

$x=-7 \text{ and } y=3 $

Work Step by Step

Equating the real parts and equating the imaginary parts, the given equation, $ 2x+3yi=-14+9i ,$ implies \begin{align*} 2x&=-14 \\\\&\text{ and }\\\\ 3y&=9 .\end{align*} Solving each equation results to \begin{align*} 2x&=-14 \\ \dfrac{2x}{2}&=-\dfrac{14}{2} \\ x&=-7 \\\\&\text{ and }\\\\ 3y&=9 \\ \dfrac{3y}{3}&=\dfrac{9}{3} \\ y&=3 .\end{align*} Hence, $ x=-7 \text{ and } y=3 $.
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