Answer
$12x^2-5x-4$
Work Step by Step
To combine like terms, add the coefficients.
$3x^2-5x-2+4x^2+x-4+5x^2-x+2=(3+4+5)x^2+((-5)+1+(-1))x+((-2)+(-4)+2)=12x^2-5x-4$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 5 - Section 5.2 - Simplifying Algebraic Expressions - Exercise - Page 218: 38
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