Quadratic equation: your town wants to put a square fountain in the park. the fountain will have a sidewalk around it that is 4 ft wide. the total space that the fountain and sidewalk can use is 800 ft^2. what are the largest dimensions that can be used for the fountain? a. x^2+16=800. b. x^2 + 16x + 64 = 800. c. x^2 +8x +16 = 800. d. none of the choices are correct