Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 4 - Polynomials - Study Summary - Practice Exercises: 26

Answer

$x^2+18x+81$

Work Step by Step

RECALL: $(a+b)^2=a^2+2ab+b^2$ Use the formula above with $a=x$ and $b=9$ to obtain: $(x+9)^2 \\=x^2+2(x)(9)+9^2 \\=x^2+18x+81$
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