Take a look at the applet: Quadratic Functions
A function of the form , is called a quadratic function (if ).
The graph of a quadratic function can be derived by transformations of the graph of .
The graph of every quadratic function is a parabola with vertex andaxis of symmetry .
If then the parabola will open upwards.
If then the parabola will open downwards.
The quadratic equation can be rewritten as: .
If there are two solutions.
If there is only one solution.
If there are no solutions.
You can find the solutions by using radicals.