Answer
$x^{2}$-4
Work Step by Step
(x-2)(x+2)=$x^{2}$-$2^{2}$=$x^{2}$-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 6 - Section 6.4 - Factoring Trinomials of the Form ax2+bx+c by Grouping - Exercise Set - Page 441: 51
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