Answer
$25x^2 -70xy+49y^2$
Work Step by Step
By using the FOIL method, we have
$$
(5x - 7y)^2=25x^2 +2(5x)(-7y)+49y^2\\
=25x^2 -70xy+49y^2
.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 10 - Cumulative Review - Page 359: 26
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