Answer
$y^2-144$
Work Step by Step
RECALL:
$(a-b)(a+b)=a^2-b^2$
Use the formula above to have:
$(y-12)(y+12)
\\=y^2-12^2
\\=y^2-144$
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 10.4 - Special Products - Exercise - Page 352: 28
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