Answer
See below.
Work Step by Step
The product of a binomial sum and a binomial difference is: $(A+B)(A-B)=A^2-B^2$.
So here $A=\sqrt{16x^2}=4x$ and $B=\sqrt{49}=7$, so $16x^2-49=(4x+7)(4x-7)$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 5 - Section 5.5 - Factoring Special Forms - Concept and Vocabulary Check - Page 371: 6
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