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 - Mid-Chapter Review - Mixed Review - Page 263: 19



Work Step by Step

By combining like terms, the given expression, $ (3a^4-9a^3-7)-(4a^3+13a^2-3) $, simplifies to \begin{array}{l}\require{cancel} 3a^4-9a^3-7-4a^3-13a^2+3 \\\\= 3a^4+(-9a^3-4a^3)-13a^2+(-7+3) \\\\= 3a^4-13a^3-13a^2-4 .\end{array}
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