How Google Doodle is celebrating quadratic equations

Google's latest animated Doodle celebrates the quadratic equation, transforming its homepage into an interactive classroom.
The New York Times

This Professor’s ‘Amazing’ Trick Makes Quadratic Equations Easier

Looking for the answers to ax² + bx + c = 0? A mathematician has rediscovered a technique that the ancient Babylonians used. By Kenneth Chang and Jonathan Corum The quadratic equation has frustrated ...