Answer
-3, 6
Work Step by Step
Solving by setting the factors equal to zero, we find:
$$2\left(r^2-3r-18\right)\\ 2\left(r+3\right)\left(r-6\right) \\ r=-3, 6$$
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 3 - Quadratic Functions - 3.1 Introduction to the Family of Quadratic Functions - Exercises and Problems for Section 3.1 - Exercises and Problems - Page 121: 17
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