College Algebra (6th Edition)

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: 14

Answer

$6x^3+10x^2+11x-8$; Degree 3

Work Step by Step

$$(8x^2+7x-5)-(3x^2-4x)-(-6x^3-5x^2+3)$$ $$=-(-6x^3)+(8x^2-3x^2-(-5x^2))+(7x-(-4x))+(-5-3)$$ $$=6x^3+(5x^2+5x^2)+(7x+4x)-8$$ $$=6x^3+10x^2+11x-8$$
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