Answer
$21t^{2}-26t+8$
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:
$=21t^{2}-12t-14t+8$
$=21t^{2}-26t+8$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 1 - Section 1.3 - Algebraic Expressions - 1.3 Exercises - Page 33: 25
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