Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 1 - Review Exercises - Page 154: 112


$x \leq -1, x \geq 3$

Work Step by Step

$x^2-2x-3\geq 0$ $(x-3)(x+1) \geq 0$ $x \leq -1, x \geq 3$ (The key numbers are 3 and -1. The interval before -1 and the interval after 3 satisfy the inequality, which can be seen by checking for x=-3 and x=5)
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