Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.3 - Algebraic Expressions - 1.3 Exercises: 24



Work Step by Step

Expand the brackets, be mindful of the negative sign: $=15t-20-t^{2}-2-2t^{2}+6t$ Collect the like terms: $=(-1-2)t^{2}+(15+6)t+(-20-2)$ $=-3t^{2}+21t-22$
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