How did imaginary numbers come into existence? What was the first problem that required use of imaginary number?

Question

How did imaginary numbers come into existence? What was the first problem that required use of imaginary number?

In: 760

Answer 1

I think the best way to answer this question is by this fantastic video by Veritasium : [How Imaginary Numbers Were Invented](https://www.youtube.com/watch?v=cUzklzVXJwo&t=7s&pp=ygURaW1hZ2luYXJ5IG51bWJlcnM%3D)

It goes through the entire history and necessity for such a tool in Mathematics. Really fascinating