Answer
$6x^2-6x+2$; Degree 2
Work Step by Step
$$(5x^2-7x-8)+(2x^2-3x+7)-(x^2-4x-3)$$ $$=(5x^2+2x^2-x^2)+(-7x-3x-(-4x))+(-8+7-(-3))$$ $$=6x^2+(-10x+4x)+(-1+3)$$ $$=6x^2-6x+2$$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.4 - Page 61: 13
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