Functions Modeling Change: A Preparation for Calculus, 5th Edition

Published by Wiley
ISBN 10: 1118583191
ISBN 13: 978-1-11858-319-7

Chapter 4 - Exponential Functions - Exercises to Skills for Chapter 4 - Page 185: 9


$\pm 4$

Work Step by Step

This question is asking "What number squared gives $4^2$?" $4^2$ can be simplified to $16$. In this case, squaring $-4$ or $4$ leads to $4^2$, or $16$. Thus, $\sqrt{4^2}=\pm4$.
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