Answer
$c^2-d^2.$
Work Step by Step
This is a product of the sum and difference of two terms, so we have
$$
(c-d)(c+d)=c^2-d^2.
$$
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: 1
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