Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 11 - Section 11.4 - Partial Sums of Arithmetic and Geometric Sequences - Exercise Set: 53

Answer

$x^2+10x+25$

Work Step by Step

Using $(a+b)^2=a^2+2ab+b^2$ (or the square of a binomial), the given expression, $ (x+5)^2 ,$ is equivalent to \begin{array}{l}\require{cancel} (x)^2+2(x)(5)+(5)^2 \\\\= x^2+10x+25 .\end{array}
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