Answer
$$14a^2+21ab-28a^2b.$$
Work Step by Step
By multiplying each term of the polynomial by the monomial, and then adding the products, we have
$$7a(2a+3b-4ab)=7a(2a) +7a(3b)-7a(4ab)\\
=14a^2+21ab-28a^2b.$$
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 5.5 - Multiplication of Polynomials - Exercise - Page 225: 14
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