The vertex form of the quadratic equation is f(x) = a x² + b x + c and the standard form is f(x) = a(x - h)² + k.[br][br]Adjust the sliders a, b, and c to create the quadratic equation that you wish to explore. The vertex is at (h, k). Select check box to see the vertex[br][br]Select check box to see roots or points of intersection of the graph and the x-axis. Another check box will show how to use the quadratic formula to solve for the roots of the equation.