Answer
$40a^2b$
Work Step by Step
Multiply the numerical coefficients. Add the powers of the variables.
$(4ab)(10a)=(4\times10)a^{1+1}b=40a^2b$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 5 - Section 5.4 - Multiplication of Monomials - Exercise - Page 223: 10
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