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 ...

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 ...

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 ...