Which is the graph of a quadratic equation that has a positive discriminant?

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

Me find the value of x each figure.

What is the product? a-3/15a × 5/a-3