Answer
$4x^2 -4x+12$
Work Step by Step
We do the subtraction as follows:
$$
(8x^2 - 2x+5)-(4x^2 + 2x -7)\\
=8x^2 - 2x+5-4x^2 - 2x +7\\
=4x^2 -4x+12
.$$
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: 51
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