Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 5 - Section 5.1 - Adding and Subtracting Polynomials - Exercise Set: 32

Answer

-11$r^{4}$ + r

Work Step by Step

(7$r^{4}$+5$r^{2}$ + 2r) + (-18$r^{4}$ -5 $r^{2}$ -r) The like terms are 7$r^{4}$ and -18$r^{4}$ (both containing $r^{4}$) , 5$r^{2}$ and -5 $r^{2}$ (both containing $r^{2}$) , 2r and -r (both containing r). We begin by grouping these pairs of like terms =(7$r^{4}$ -18$r^{4}$) + (5$r^{2}$ - 5 $r^{2}$) + ( 2r - r) = -11$r^{4}$ + r
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