Intermediate Algebra: Connecting Concepts through Application

by Clark, Mark; Anfinson, Cynthia

Published by Brooks Cole

ISBN 10: 0-53449-636-9

ISBN 13: 978-0-53449-636-4

Chapter 3 - Exponents, Polynomials and Functions - 3.4 Factoring Polynomials - 3.4 Exercises - Page 270: 17

Answer

$(x-8)(x+7)$

Work Step by Step

Separate all the terms into two sets of parentheses. Then find the greatest common factor of each set to factor. $x^2-8x+7x-56$ $=(x^2-8x)+(7x-56)$ $=x(x-8)+7(x-8)$ $=(x-8)(x+7)$

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