SOLUTION: which of the following is the vertex form of y=3x^-24x+38?

Hi,         

the vertex form of a parabola,  where(h,k) is the vertex

y = 3x^2 -24x + 38  Completing the square

y = 3(x^2- 8x) + 38

y = 3[(x-4)^2 -16] + 38

y = 3(x-4)^2 - 48 + 38

y = 3(x-4)^2 - 10

  Vertex is Pt (4,-10)