C + d, for c= (-6) and d = (- 12)

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

Need this asap if anyone can i would be very grateful. if you could show workings that would really

In which form is the following function written? y = - 2(x – 3)(x + 5)