Solving x^2=-1, sqrt(x)=-1, abs(x)=-1
3:40
The four horsemen of x: x, χ , ɔc, æ
5:46
Huh? How do you solve this? Functional equation for precalculus students
8:20
How are they different? Cube root vs the exponent of 1/3
10:55
Can we NOT solve x^4+64=0 like this?
6:37
Believe in geometry, not squaring both sides!
6:54
How to prove the quadratic formula by completing the square
9:50
How to really solve sin(x^2)=sin(x)
9:55