Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter R - Review of Basic Concepts - R.3 Polynomials - R.3 Exercises: 92

Answer

$$9r^{2}+19$$

Work Step by Step

nitial equation: $2(3r^{2}+4r+2)-3(−r^{2}+4r−5)$ First, distribute the $2$ to the first set of parenthesis, and the $-3$ to the second: $$6r^{2}+12r+4+3r^{2}-12r+15$$ Then combine like terms to arrive at the final answer: $$9r^{2}+19$$
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