Answer
$2\sqrt 5$
Work Step by Step
$\sqrt 20=\sqrt (4\times5)=\sqrt 4\times\sqrt 5=2\sqrt 5$
We know that $\sqrt 4=2$, because $2^{2}=4$.
Intermediate Algebra (12th Edition)
by Lial, Margaret L.; Hornsby, John; McGinnis, Terry
Published by
Pearson
ISBN 10:
0321969359
ISBN 13:
978-0-32196-935-4
Chapter 7 - Review Exercises - Page 498: 55
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.
