Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2u3/ Esercizi: http://www.khanacademy.org/math/algebra/exponents-radicals/e/square_roots Traduzione in Italiano del video Understanding Square Roots http://www.youtube.com/watch?feature=player_embedded&v=ROIfbUQrSY4 http://www.khanacademy.org/math/algebra/exponents-radicals/v/understanding-square-roots