Answer
$$ x=-\frac{2}{7},-2$$
Work Step by Step
Factoring the equation, we find:
$$ x\left(7x+2\right)+2\left(7x+2\right) \\ \left(7x+2\right)\left(x+2\right) \\ x=-\frac{2}{7},-2$$
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 - Review Exercises and Problems for Chapter Three - Page 129: 6
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