Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 1 - Section 1.2 - Operations with Real Numbers and Simplifying Algebraic Expressions - Exercise Set - Page 28: 122

Answer

$9x^2+12x$

Work Step by Step

Rearrange and group like terms, and then simplify using the distributive property to find: $=(5x^2+4x^2)+(9x+3x) \\=(5+4)x^2+(9+3)x \\=9x^2+12x$
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