Answer
$-6x^2+2x-10$
Work Step by Step
We do the subtraction as follows:
$$
(3x^2 + 2x - 4 )-(9x^2 +6 )\\
=3x^2 + 2x - 4-9x^2 -6\\
=-6x^2+2x-10
.$$
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 5.3 - Addition and Subtraction of Polynomials - Exercise - Page 221: 53
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