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 - Page 260: 42



Work Step by Step

Removing the grouping symbols, then the given expression, $ (a^2-3a-2)-(2a^2-6a-2) $, is equivalent to \begin{array}{l} a^2-3a-2-2a^2+6a+2 .\end{array} By combining like terms, then \begin{array}{l} (a^2-2a^2)+(-3a+6a)+(-2+2) \\\\= -a^2+3a+0 \\\\= -a^2+3a .\end{array}
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