Precalculus (6th Edition) Blitzer

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

Chapter P - Section P.7 - Equations - Exercise Set: 71

Answer

$x=3\pm\sqrt {20}$

Work Step by Step

$x^2 - 6x - 11 = 0$ $x^2-6x+9=20$ $(x-3)^2=20$ $x-3=\pm\sqrt {20}$ $x=3\pm\sqrt {20}$
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