2(x + 2)2 - 18 = 0 is the equation resulting from setting a quadratic function f(x) equal to 0 and completing the square Which of the following statements about f(x) is true? (1 point)
Of(x) has its vertex at (2, -18)
Of(0) has a graph that opens downward.
Of(2) has an axis of symmetry at I =
-18
Of(z) has an axis of symmetry at =
2.