If the graph of the quadratic function y = a x 2 + b x + c crosses the x -axis, the values of x at the crossing points are the roots or solutions of the equation a x 2 + b x + c = 0.

Identify properties of a quadratic function In this part you do not have to sketch the graph and you may even be given the sketch of the graph to start with.

Quadratic equations are polynomials, meaning strings of math terms. An expression like “x + 4” is a polynomial. They can have ...