Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 5 - Section 5.3 - Special Products - Exercise Set: 55

Answer

$49-28x+4x^2$

Work Step by Step

Using $(a\pm b)^2=a^2\pm2ab+b^2$ or the square of a binomial, the square of the given expression, $( 7-2x )^2,$ is \begin{array}{l}\require{cancel} (7)^2-2(7)(2x)+(2x)^2 \\\\= 49-28x+4x^2 .\end{array}
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