what is the equation, in standard form, of a parabola that contains the following points?

(-2-20). (0-4), (4-20)

1 answer

If your bizarre notation indicates the points (-2,-20),(0,-4),(4,-20), then

4a-2b+c = -20
c = -4
16a+4b+c = -20
(a,b,c) = (-2,4,-4)

y = -2x^2 + 4x - 4