Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 10 - Section 10.4 - Special Products - Exercise: 15

Answer

$x^2y^2-8xy+16$

Work Step by Step

RECALL: $(a-b)^2=a^2-2ab+b^2$ Use the formula above to have: $(xy-4)^2 \\=(xy)^2-2(xy)(4) + 4^2 \\=x^2y^2-8xy+16$
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