Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Review - Test - Page 138: 23

Answer

(a) $-2.94$, $-0.11$, and $3.05$ (b) $-1\leq x\leq2$

Work Step by Step

(a) Graph the equation as shown with the red curve in the figure. There are three x-intercepts which represent the solutions of the equation, they are $x=-2.94$, $x=-0.11$, and $x=3.05$ (b) Graph the inequality as shown with the blue region in the figure. The range of the region provides the solution to the inequality, which is $x\in [-1,2]$
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