Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter R - Review of Basic Concepts - R.3 Polynomials - R.3 Exercises - Page 33: 82

Answer

$4m^2+28m+49-4mn-14n+n^2$

Work Step by Step

Use the formula $(a-b)^2=a^2-2ab+b^2$ and treat $2m+7$ as a single term, we have: $[(2m+7)-n]^2=(2m+7)^2-2(2m+7)n+n^2=4m^2+28m+49-4mn-14n+n^2$
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