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: 43

Answer

$9x^{2}+42xy+49y^{2}$

Work Step by Step

$(3x+7y)^{2}$ $=(3x+7y)(3x+7y)$ $=3x(3x+7y)+7y(3x+7y)$ $=9x^{2}+21xy+21xy+49y^{2}$ $=9x^{2}+42xy+49y^{2}$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.