Answer
$x=4$
or
$x=-4$
Work Step by Step
$x^2+4=0$ Factor
$(x+4)(x-4)=0$
$x=4$
or
$x=-4$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 11 - Section 11.1 - Solving Quadratic Equations by Completing the Square - Exercise Set - Page 763: 16
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