Answer
$2.94 m^3+6.02mn^2$
Work Step by Step
By multiplying each term of the polynomial by the factor $1.28m$, and then adding the products, we have
$$
1.28m(2.3m^2 + 4.7n^2)=1.28m(2.3m^2) +1.28m( 4.7n^2)\\
=2.94 m^3+6.02mn^2
.\\
$$
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 5.5 - Multiplication of Polynomials - Exercise - Page 225: 26
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