Answer
$3a^2-17a +20$
Work Step by Step
We multiply each term of the first
polynomial by each term of the second polynomial. Then we add the products, as follows
$$
(3a- 5)(a - 4)=3a(a - 4)- 5(a - 4)\\
=3a^2-12a-5a+20=3a^2-17a +20
.$$
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 226: 43
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