Find the vertex of the parabola y=3x2−12x+15y = 3x^2 - 12x + 15y=3x2−12x+15.
(2,3)(2, 3)(2,3)
(1,6)(1, 6)(1,6)
(2,15)(2, 15)(2,15)
(0,15)(0, 15)(0,15)