Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 6 - Section 6.5 - Factoring by Special Products - Exercise Set - Page 447: 7


$(5a-4b)^{2}$ is a perfect square trinomial.

Work Step by Step

25$a^{2}$ -40ab+16$b^{2}$=$(5a)^{2}$ -2(5a)(4b)+$(4b)^{2}$= $(5a-4b)^{2}$
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