Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Appendix A - Review - A.7 nth Roots; Rational Exponents - A.7 Assess Your Understanding - Page A60: 32


$-1+\sqrt 5$

Work Step by Step

To simplify the expression, we distribute (FOIL) and combine the like terms as follows: $$ (\sqrt 5-2)(\sqrt 5+3)=(\sqrt 5)^2+3\sqrt 5-2\sqrt 5-6\\ =5+\sqrt 5-6=-1+\sqrt 5 .$$
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.