#### Answer

$x=-9,9$

#### Work Step by Step

When taking the square root of a number, you get a positive and a negative answer.
$2x^2=162$
$x^2=81$
$x=-9,9$

Published by
Brooks Cole

ISBN 10:
0-53449-636-9

ISBN 13:
978-0-53449-636-4

$x=-9,9$

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