We don’t often think about the roots of trees until there is a problem. A forester friend of mine called it a “fencepost mentality.” Being underground, they are often out of sight out of mind. However ...

This jingle has helped generations of algebra students recall the quadratic formula that solves every equation of the form $latex ax^2+bx+c=0$. The formula is as ...

I also hinted that I had a killer solution to the root-finding problem, and promised to show it to you some day. That day has arrived. I first wrote about this problem in 1994.[1,2,3] Those of you ...