Answer
$12x^3-5x^2-4x-4$; Degree 3
Work Step by Step
$$(-7x^3+6x^2-11x+13)+(19x^3-11x^2+7x-17)$$ $$=(-7x^3+19x^3)+(6x^2-11x^2)+(-11x+7x)+(13-17)$$ $$=12x^3-5x^2-4x-4$$
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: 10
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