Answer
$(5y-10)(5y+10)=25(y+2)(y-2)$
Work Step by Step
Factoring the difference of two squares, we have
$$
25y^2-100=(5y-10)(5y+10)
.$$
This can be further factored as:
$$(5y-10)(5y+10)=5(y-2)5(y+2)=25(y+2)(y-2)$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 10 - Review - Page 358: 40
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