Question

Find the x-intercepts of the parabola with vertex (-3,16) and y-intercept (0,-20).
Write your answer in this form: (x1,y1),(x2,y2).
If necessary, round to the nearest hundredth.
Use the method of completing the square to write the equation of the given parabola in this form:

(y – k) = a(x – h)2

where a ≠ 0, (h,k) is the vertex, and x = h is the axis of symmetry.