Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 1 - Equations and Inequalities - Chapter 1 Test Prep - Review Exercises - Page 178: 44

Answer

$\sqrt 2\pm1$

Work Step by Step

Step 1. Given $\sqrt 2x^2-4x+\sqrt 2=0$, we have $a=\sqrt 2, b=-4, c=\sqrt 2$ Step 2. Use the quadratic formula, we have $x=\frac{4\pm\sqrt {(-4)^2-4(\sqrt 2)(\sqrt 2)}}{2\sqrt 2}=\frac{4\pm\sqrt {8}}{2\sqrt 2}==\frac{2\pm\sqrt {2}}{\sqrt 2}=\sqrt 2\pm1$
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