Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 3 - Exponents, Polynomials and Functions - 3.2 Combining Functions - 3.2 Exercises - Page 244: 45



Work Step by Step

Use the FOIL method on the second and third sets of parentheses. Then combine like terms. $(2x^2+3x-9)+(7x+2)^2$ $=(2x^2+3x-9)+(7x+2)(7x+2)$ $=(2x^2+3x-9)+(49x^2+28x+4)$ $=51x^2+31x-5$
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