Answer
49$x^{2}$ - 25
Work Step by Step
( 7x - 5 ) ( 7x + 5 ) the sum and difference of the same two terms
$( 7x )^{2}$ - $5^{2}$
49$x^{2}$ - 25
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 5 - Section 5.6 - Special Products - Exercise Set - Page 388: 44
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