Answer
two
Work Step by Step
$c^{2}-18=9$
$c^{2}=27$
Now you can take the square root and you will get a positive and negative number as the answers. Both of them are solutions.
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: 38
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