#### Answer

$x=-2$

#### Work Step by Step

Note that the only point on the graph where the value of the function is $4$ is $(-2, 4)$.
This means that $f(x) = 4$ only when $x=-2$.

Published by
Pearson

ISBN 10:
0-13417-894-7

ISBN 13:
978-0-13417-894-3

$x=-2$

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