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 7 - Functions and Graphs - 7.5 Formulas, Applications, and Variation - 7.5 Exercise Set: 86

Answer

$\color{blue}{x^2+6x+9}$

Work Step by Step

RECALL: $(a+b)^2=a^2+2ab+b^2$ Use the formulal above to obtain: $(3+x)^2 \\=3^2+2(3)(x)+x^2 \\=9+6x+x^2 \\=\color{blue}{x^2+6x+9}$
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