Semplificazione di Radicali

Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2xc/ Esercizi: http://www.khanacademy.org/exercises?exid=simplifying_radicals Traduzione in Italiano del video Simplifying radicals http://www.youtube.com/watch?v=6QJtWfIiyZo http://www.khanacademy.org/video/simplifying-radicals?playlist=Pre-algebra Help us caption & translate this video! http://amara.org/v/B2xc/