Loh Po-Shen is a graduate of California Institute of Technology and an associate professor at Carnegie Mellon University.
In October 2019, Loh published a new way to solve quadratic equations. It is breathtakingly simple and easy to understand, and much faster in producing solutions. And yet if it so simple, why has it not been put together since Euclid first discovered quadratic equations? Loh searched extensively and found no other mathematicians had done this. (I said put together and not discovered because the techniques he uses are already known.)
Loh’s method involves simple distributive mathematics and pythagorean triples, though he does not used the latter term in this video. In his final example, he shows how his method produces the traditional quadratic equation (-b +/- √(b^2-4ac))/2a. As a fan of and dabbler in number theory, this is staggeringly beautiful.
Science Alert reported on this as well. The page contains another video explaining the technique.