Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 9 - Cumulative Review Exercises - Page 1038: 3

Answer

$x=9$

Work Step by Step

Step 1. Taking the square on both sides, we have $x^2-10x+25=x+7$ or $x^2-11x+18=0$ Step 2. Factoring the left side, we have $(x-2)(x-9)=0$, which gives $x=2$ and $x=9$ Step 3. Check the answers; we find only $x=9$ fits the original equation.
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