MM4B Quadratic Functions. This video re-visits Quadratic Functions, presents a summary of the features of Quadratic Functions, shows the various ways of solving quadratic equations, talks about the use of the discriminant and then show how completing the square can be used to describe the transformation steps from the basic function of a quadratic to a new variant in turning point form. The video was made for students studying Mathematical Methods (CAS) in Year 12, a course fully prescribed by the Victorian Curriculum and Assessment Authority in the State of Victoria, Australia