Answer
$$r = 0$$
Work Step by Step
First you subtract 49 from both sides. That gives you $$r^2 = 0$$ Since the square root of 0 is 0, there is only one solution and that is 0.
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 9 - Quadratic Functions and Equations - 9-3 Solving Quadratic Equations - Practice and Problem-Solving Exercises - Page 551: 20
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