Answer
$x=\pm2$
Work Step by Step
$4x^2 - 16 = 0$
$4x^2 = 16$
$x^2=4$
$x=\pm\sqrt 4=\pm2$
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: 105
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