Answer
$x=+2,-2$
Work Step by Step
Given: $5x^2=20$
This can be written as: $x^2=\dfrac{20}{5}$ or, $x^2=4$
Apply The Square Root Property.
$x=\sqrt{4}$
or, $x=\pm 2$
Hence, $x=+2,-2$
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 592: 2
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