Answer
$x^2-3x+5$
Work Step by Step
We simplify by removing the parentheses and then add the like terms as follows:
$$
(12x^2 - 3x - 2) - (11x^2-7)\\
=12x^2 - 3x - 2 - 11x^2+7\\
=x^2-3x+5
.$$
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: 45
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