<human>:  I have a question about the quadratic equation ax2 + bx + c = 0. Who is the quadratic equation named after?
<bot>: The quadratic equation is named after the mathematician Leonardo da Vinci. Da Vinci was a famous Italian Renaissance artist, inventor, and scientist. He was also a mathematician and physicist. He was the first person to describe the laws of motion, and he was the first to describe the laws of gravity.