Answer
$$(4x-1)(4x+1).$$
Work Step by Step
This is a difference between two squares, and hence
$$16x^2-1=(4x-1)(4x+1).$$
One can check as follows
$$(4x-1)(4x+1)=16x^2-4x+4x+1=16x^2-1
.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 10 - Section 10.5 - Finding Factors of Special Products - Exercise - Page 354: 22
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