Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 8 - Section 8.5 - Radical Equations - Exercise Set - Page 607: 4



Work Step by Step

$\sqrt x-9=0$ Add 9 to both sides. $\sqrt x-9+9=0+9$ Simplify. $\sqrt x=9$ Square both sides. $(\sqrt x)^2=9^2$ Simplify. $x=81$
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