Precalculus (6th Edition)

by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie

Published by Pearson

ISBN 10: 013421742X

ISBN 13: 978-0-13421-742-0

Chapter 3 - Polynomial and Rational Functions - 3.1 Quadratic Functions and Models - 3.1 Execises - Page 320: 85

Answer

$(-4,2)$

Work Step by Step

Based on the graph from the exercise #83, the interval for which $f(x)\lt0$ can be identified as $(-4,2)$

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