\\br In this video, we explain how to solve a quadratic equation when the discriminant (b^2-4ac) is negative. This means we end up with .brTopic: The Quartic Equation aka Polynominal of 4th degree What you should know? - Solution of Quadratic and Cubic equation - Determinant of Quadratic .brWelcome to my HSC 4 Unit maths: Complex Numbers series. In this video we learn how to solve quadratic equations with complex coefficients. Be sure to .brTopic: The Quartic Equation aka Polynominal of 4th degree What you should know? - Solution of Quadratic and Cubic equation - Determinant of Quadratic .