[list=1][*]Create sliders for [b]b[/b] and [b]c[/b][br][br][/*][*]In the input bar enter: [b]f(x)=x² + b*x + c[/b][br][br][/*][*]Add two points [b]A[/b] and [b]B[/b] on the x-axis [br][br][/*][*]In the input bar enter: [b]s=x(A)[/b][br][br][/*][*]In the input bar enter: [b]t=x(B)[br][/b][br][/*][*]In the input bar enter: [b]g(x)=(x-s)(x-t)[/b][br][/*][/list]