Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter P - Section P.4 - Polynomials - Exercise Set - Page 56: 12

Answer

$9x^4+4x^3-2x+1$ Degree: 4

Work Step by Step

$ (18x^4 - 2x^3 - 7x + 8) - (9x^4 - 6x^3 - 5x + 7) =18x^4 - 2x^3 - 7x + 8-9x^4 + 6x^3 + 5x - 7=9x^4+4x^3-2x+1$ For monomials with the same power, you can add their coefficients to combine them. The degree of a polynomial is the highest power.
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