Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 9 - Roots and Radicals - 9.5 - Solving Radical Equations - Problem Set 9.5 - Page 424: 7



Work Step by Step

Recall, in order to cancel out a square root, we square both sides of the equation. Thus, we square both sides of the equation to obtain that 4x=9. We divide both sides of the equation by 4 to isolate x and obtain: x=9/4. We now must check our solution: $\sqrt{9/4 \times 4} = 3 \\\\\ \sqrt {9}=3 \\\\ 3=3$ This is true, so x=9/4.
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