Answer
The negative solution is not considered since we are looking for an interest rate.
Work Step by Step
Interest rates are usually positive, so a negative interest rate in this case would not work.
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 8 - Section 8.1 - Solving Quadratic Equations by Completing the Square - Vocabulary, Readiness & Video Check - Page 482: 9
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