Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 8 - Section 8.1 - The Square Root Property and Completing the Square - Concept and Vocabulary Check - Page 592: 4


$x = 3i$ or $x=-3i$

Work Step by Step

$x^2 = -9$ Using the Square Root Property $u^2 = d$, then $u = \sqrt d$ or $u = - \sqrt d$. Thus, $x = \sqrt{-9}$ or $x = -\sqrt {-9}$ $x = \sqrt{9} \sqrt{-1}$ or $x = -\sqrt {9} \sqrt{-1}$ $x = 3i$ or $x=-3i$
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