Precalculus: Mathematics for Calculus, 7th Edition

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

Chapter 1 - Section 1.8 - Inequalities - 1.8 Exercises - Page 89: 51

Answer

(-$\infty$,-2] $\cup$ [1,3]

Work Step by Step

(x+2)(x-1)(x-3) $\leq$ 0 Factors are zero when x=-2, x=1 or x=3, these three points create four intervals, endpoints satisfy the inequality, plug in values from these intervals to decide which of them satisfy the inequality.
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