Answer
The solution set is $\left\{-\sqrt{11}, \sqrt{11}\right\}$.
Work Step by Step
Add 55 to both sides:
$5x^2-55+55=0+55
\\5x^2=55$
Divide 5 to both sides:
$x^2 = 11$
Get the square root of both sides:
$x= \pm \sqrt{11}$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 8 - Sections 8.1-8.3 - Integrated Review - Summary on Solving Quadratic Equations - Page 504: 23
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