Intermediate Algebra (6th Edition)

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

Chapter 5 - Section 5.3 - Polynomials and Polynomial Functions - Exercise Set: 61

Answer

$3x^{2}+x+18$

Work Step by Step

We are given the expression $(5x^{2}+x+9)-(2x^{2}-9)$. We can subtract the second polynomial from the first polynomial by adding the opposite of the second polynomial to the first polynomial. $(5x^{2}+x+9)+(-2x^{2}+9)$ We can combine like terms to simplify. $(5x^{2}-2x^{2})+x+(9+9)=3x^{2}+x+18$
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