i as the principal root of -1 (a little technical) | Precalculus | Khan Academy
Watch video i as the principal root of -1 (a little technical) | Precalculus | Khan Academy online, duration 06 minute 45 second in high hd quality that is uploaded to the channel Khan Academy 12 July 2011. Share the link to the video on social media so that your subscribers and friends will also watch this video. This video clip has been viewed 365 thousand times and liked it 1 thousand visitors.
