Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter P - Review Exercises - Page 143: 97



Work Step by Step

The first and last terms are perfect squares, $16x^{2}=(4x)^{2}$ $25=5^{2}$ The middle term is $-2(4x)(5)$, so we apply the formula: $(A-B)^{2}=A^{2}-2AB+B^{2}$ $=(4x-5)^{2}$
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