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: 81

Answer

9x$^3$+11x$^2$-8

Work Step by Step

Distribute the negative sign to the parentheses and then combine like terms vertically. $\qquad7x^3+5x^2-3$ $\underline{-(-2x^3-6x^2+5)}$ $\qquad\qquad\downarrow$ $\quad7x^3+5x^2-3$ $\underline{\,+2x^3+6x^2-5}$ $\quad9x^3+11x^2-8$
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