Answer
$x=3\pm\sqrt {20}$
Work Step by Step
$x^2 - 6x - 11 = 0$
$x^2-6x+9=20$
$(x-3)^2=20$
$x-3=\pm\sqrt {20}$
$x=3\pm\sqrt {20}$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.7 - Equations - Exercise Set - Page 106: 71
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