#### Answer

$B$

#### Work Step by Step

Take the square root of both sides to obtain:
$\sqrt{x^2}=\pm \sqrt{20}
\\x = \pm \sqrt{4(5}
\\x=\pm 2\sqrt{5}$
Thus, the answer is $B$.

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

$B$

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