#### Answer

The solution set is: $\left\{-\sqrt{31}, \sqrt{31}\right\}$.

#### Work Step by Step

Add 31 to both sides:
$x^2-31+31=0+31
\\x^2=31$
Get the square root of both sides:
$x= \pm \sqrt{31}$

Published by
Pearson

ISBN 10:
0321785045

ISBN 13:
978-0-32178-504-6

The solution set is: $\left\{-\sqrt{31}, \sqrt{31}\right\}$.

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