adding and subtracting complex numbers video, complex numbers video.
great
February 11, 2009, 1:11 pm
I have activated my account, but I am still not able to see the entire video...
February 11, 2009, 8:36 pm
I cannot get the videos to play.
February 12, 2009, 9:07 am
great, but still trying to become accustomed w/ site
September 18, 2009, 7:15 am