Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Appendix A - A.2 - Formulas and Equations - Exercises - Page 549: 12

Answer

$8x$

Work Step by Step

By using the FOIL method, we multiply the first, outside, inside, and the last element of each bracket and we add them. So, $(x+2)^2 - (x-2)^2=(x+2)\times (x+2) - (x-2)\times (x-2) = x^2+4x+4 - (x^2-4x+4) = 4x+4x = 8x$
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.