Precalculus (6th Edition) Blitzer

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

Chapter P - Section P.3 - Radicals and Rational Exponents - Exercise Set - Page 48: 137

Answer

$3$

Work Step by Step

Let each blank be number $x$; then $(5+\sqrt x)(5-\sqrt x)=22$ Rewrite the equation as $25-x=22$ We get $x=3$.
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