Answer
$$x=\pm 2$$
Work Step by Step
Isolating the variable, we find:
$$ x=\sqrt{4} \\ x=\pm 2$$
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 2 - Functions - 2.4 Preview of Transformations: Shifts - Exercises and Problems for Section 2.4 - Skill Refresher - Page 94: S5
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