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 - Page 348: 19


12$x^{2}$ + 15x - 9

Work Step by Step

(4$x^{2}$ + 6x - 7) + (8$x^{2}$+9x-2) The like terms are 4$x^{2}$ and 8$x^{2}$ containing the same variable to the same power($x^{2}$), as well as 6x and 9x (both containing x), and the constant terms -7 and -2. We begin by grouping these pairs of like terms. (4$x^{2}$ + 8$x^{2}$) + (6x + 9x) +(-7-2) = 12$x^{2}$ + 15x - 9
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