Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 8 - Radical Functions - 8.5 Complex Numbers - 8.5 Exercises: 72

Answer

$x=\pm3$

Work Step by Step

Step 1: $2x^{2}-18=0$ Step 2: $2x^{2}=18$ Step 3: $x^{2}=9$ Step 4: Using the square root property, $x=\pm\sqrt {9}$. Step 5: $x=\pm3$
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