Vsauce2

Can You INVENT a Number? Yes. #shorts (2021x31)

Air date: Nov 30, 2021

What do you do when you've got a mathematical expression that's unsolvable because the numbers you need don't exist? You do what Hero of Alexandria did: you just invent one. That's how we got the concept of imaginary numbers, which Rene Descartes derided as being totally useless. Turns out he was wrong. #shorts