Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 2 - Linear and Quadratic Functions - Section 2.8 Equations and Inequalities Involving the Absolute Value Function - 2.8 Assess Your Understanding - Page 182: 25

Answer

$x=1/2~or~x=-1/2$.

Work Step by Step

Using the definition of the absolute value, we have $$ 4-|2x|=3\Longrightarrow |2x|=4-3=1 \Longrightarrow 2x=1~or~ 2x=-1 .$$ Thus, we have the two possible solutions: $x=1/2~or~x=-1/2$.
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