Also: http://thinkinghard.com/domkol/main.html http://thinkinghard.com/domkol/main.html This interactive visualization lets you see that the number of times th

Also: http://thinkinghard.com/domkol/main.html http://thinkinghard.com/domkol/main.html This interactive visualization lets you see that the number of times the polynomial function "winds" around the circumference of the circle is equal to the number of zeroes inside the same circle. (Caveat: the interaction to move the zeroes around requires a mouse.)