Change the function f(x) = –2x² + 12x – 6 into vertex form.
A f(x) = -2(x – 3)2 – 24
b f(x) = -2(x - 3)2 – 6
C f(x) = -2(x - 3)2 + 12
D f(x) = -2(x – 36)2 – 30