Answer
$= 462$
Work Step by Step
We plug in the values for the variables that are given in the problem:
$(3a + b)(7a-2b)$
$= (3(5)+7)(7(5)-2(7))$
$= (15 + 7)(35 - 14)$
$= 22(21)$
$= 462$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.1 - Numerical and Algebraic Expressions - Problem Set 1.1 - Page 7: 50
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