Why Does the Quadratic Formula Work?
9:50
Why do we "complete the square"?
6:30
Cursed Quadratic Equations
2:59
But where does the quadratic formula come from?
45:04
Why There's 'No' Quintic Formula (proof without Galois theory)
27:29
Geometry to algebra to calculus in 20 minutes.
18:08
a super nice functional equation
28:37
How does Dobble (Spot It) work?
28:28