Answer
$f=\pm 2$
Work Step by Step
We are given:
$2f^2-8=0$
$f=\frac{-0\pm \sqrt 0^2-4.2.(-8)}{2.2}$
$f=\frac{\pm8}{4}$
$f=\pm 2$
There are two solutions: $f=\pm 2$.
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 10 - Radical Expressions and Equations - 10-4 Solving Radical Equations - Practice and Problem-Solving Exercises - Page 638: 61
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