Answer
$x=\pm 5$
Work Step by Step
We are given
$4x^2-100=0$
$4(x^2-25)=0$
$(x-5)(x+5)=0$
$x=\pm 5$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 9 - Quadratic Functions and Equations - Chapter Test - Page 607: 9
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