Answer
$-5.2a^6-10a^3-4a$
Work Step by Step
By multiplying each term of the polynomial by the factor $-4a$, and then adding the products, we have
$$
-4a(1.3a^5+2.5a^2+1)=-4a(1.3a^5)-4a(+2.5a^2)-4a(+1)\\
=-5.2a^6-10a^3-4a
.\\
$$
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: 25
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