Answer
$$9x^3+4x^2+x+2.$$
Work Step by Step
We simplify by distributing the negative and combining like terms as follows:
$$(6x^3+3x^2+1)-(-3x^3-x^2-x-1)=9x^3+4x^2+x+2.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 5 - Review - Page 232: 20
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