Examples on KKT conditions and duality

Formulating dual of problem with inequality constraint
Formulating dual of problem with equality constraint
Solving problem with inequality constraint using KKT conditions
Solving problem with equality constraint using KKT conditions
Graphical illustration of KKT conditions with two inequality constraint

[@victorhong3466]

Your example at 23:43 onwards is not correct. it should be a positive lambda since your inequality constraint is less than or equals to zero.