Move the slider to change the values of parameters a, b and c.[br]What happens when the value of parameter a is zero?[br]What are the minimum and maximum number of roots for a quadratic?[br]What kind of quadratic expression results in "two repeated roots"?[br]How do we find the roots algebraically?[br][br][u]The Quadratic formula[/u]: (Tick both boxes in the applet)[br]How is the Quadratic formula related to the roots?[br]How is the Quadratic formula related to the axis of symmetry?[br]What happens to the calculation for the Quadratic formula when there are "no real roots"?