Numeri Complessi (Parte 2)

Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2wd/ Traduzione in Italiano del video Complex Numbers (part 2) http://www.youtube.com/watch?v=bPqB9a1uk_8 http://www.khanacademy.org/video/complex-numbers--part-2?playlist=Algebra