#### Answer

$q= 2,-2$

#### Work Step by Step

$5q^2-20=0$
$5q^2-20+20=0+20$
$5q^2=20$
$5q^2/5=20/5$
$q^2=4$
$\sqrt {q^2} = \sqrt 4$
$q=-2,2$

Published by
Prentice Hall

ISBN 10:
0133500403

ISBN 13:
978-0-13350-040-0

$q= 2,-2$

$5q^2-20=0$
$5q^2-20+20=0+20$
$5q^2=20$
$5q^2/5=20/5$
$q^2=4$
$\sqrt {q^2} = \sqrt 4$
$q=-2,2$

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