Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 5 - Section 5.3 - Addition and Subtraction of Polynomials - Exercise - Page 221: 35



Work Step by Step

We simplify by adding the $a^3$-terms as follows $$3a^3+a^3=4a^3,$$ adding the $a^2$-terms, $$2a^2-5a^2=-3a^2$$ adding the $a$-terms, $$-7a+4a-2a=-5a$$ adding the constant terms, $$5-2-3=0$$ The result is $$4a^3-3a^2-5a.$$
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