Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 8 - Section 8.3 - Operations with Radicals - Exercise Set: 71

Answer

-37

Work Step by Step

$(2\sqrt{3}+7)(2\sqrt{3}-7)$ Use the FOIL method to multiply the binomial. Multiply the First terms, the Outside terms, the Inside terms, and the Last terms. $(2\sqrt{3}\times2\sqrt{3})+(-7\times2\sqrt3)+(7\times2\sqrt3)+(7\times(-7))$ Simplify. $12-14\sqrt{3}+14\sqrt{3}-49$ Combine like terms/like radicals. $-37$
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.