Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2wc/ Traduzione in Italiano del video Complex Numbers (part 1) http://www.youtube.com/watch?v=kpywdu1afas http://www.khanacademy.org/video/complex-numbers--part-1?playlist=Algebra Help us caption & translate this video! http://amara.org/v/B2wc/