Solving a Quartic Equation
27:12
Austrian Olympiad System of Equations
10:43
Solving a septic equation
17:05
Solving a quartic equation using an unusual idea. An algebraic challenge.
10:43
A Non-palindromic Quartic Equation
15:29
a beautiful differential equation
17:50
1973 USAMO ( System of equations)
14:38
a! b! = a! + b! + c!
12:43