Answer
$$10x^2-7x+4.$$
Work Step by Step
We simplify by distributing the negative and combining like terms as follows:
$$(3x^2+5x+2)+(9x^2-6x-2)-(2x^2+6x-4)\\=10x^2-7x+4.$$
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: 21
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