Answer
$x=\pm8$
Work Step by Step
We solve by factoring as follows:
$$
x^2-64=0\Longrightarrow (x-8)(x+8)=0
$$
that is,
$x-8=0$ or $x+8=0$
and so $x=\pm8$.
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 11 - Test - Page 380: 1
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