Answer
$r = \sqrt\frac{A}{P}-1$
Work Step by Step
$A = P(1 + r)^2$. Solve for $r$.
$\frac{A}{P} = (1 + r)^2$
$1+r = \sqrt\frac{A}{P}$
$r = \sqrt\frac{A}{P}-1$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 8 - Section 8.1 - The Square Root Property and Completing the Square - Exercise Set - Page 593: 67
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