Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 4 - Polynomials - 4.4 Addition and Subtraction of Polynomials - 4.4 Exercise Set: 19

Answer

$7a^3-a^2+13a+7$

Work Step by Step

By combining like terms, the given expression, $ (3+6a+7a^2+a^3)+(4+7a-8a^2+6a^3) $, simplifies to \begin{array}{l} (a^3+6a^3)+(7a^2-8a^2)+(6a+7a)+(3+4) \\\\= 7a^3-a^2+13a+7 .\end{array}
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