Precalculus (6th Edition) Blitzer

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

Chapter P - Section P.4 - Polynomials - Exercise Set: 49

Answer

$49-28x+4x^2$

Work Step by Step

RECALL: $(a-b)^2=a^2-2ab+b^2$ Use the formula above with $a=7$ and $b=2x$ to obtain: $=7^2-2(7)(2x) +(2x)^2 \\=49-28x+4x^2$
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