April Fools 2011: Complex Numbers in Math Class

Following up from his video last year, Matthew Weathers (who
teaches in the Math Department of Biola University) did another video trick for his Nature of Math
class:

(Source: http://www.youtube.com/watch?v=aP4fWMLofvo)

If you miss his video last year, you can check it out here:

(Source: http://www.youtube.com/watch?v=blOrY-nEGaE)