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: 25



Work Step by Step

First: $3t\times7t = 21t^{2}$ Outside: $3t\times-4 = -12t$ Inside: $-2\times7t =-14t$ Last: $-2\times-4 = 8$ Add the results from FOIL together: $=21t^{2}-12t-14t+8$ $=21t^{2}-26t+8$
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