Find the equation, f(x) = a(x-h)2 + k, for a parabola that passes through the point (8,12) and has (6,10) as its vertex. what is the standard form of the equation? a) the vertex form of the equation is f(x) = 1 2 (x - 6)2 + 10. the standard form of the equation is f(x) = 1 2 x2 - 6x + 28. b) the vertex form of the equation is f(x) = 1 2 (x + 6)2 + 10. the standard form of the equation is f(x) = 1 2 x2 + 6x + 28. c) the vertex form of the equation is f(x) = 1 2 (x - 6)2 - 10. the standard form of the equation is f(x) = 1 2 x2 - 6x - 28. d) the vertex form of the equation is f(x) = − 1 2 (x - 6)2 + 10. the standard form of the equation is f(x) = − 1 2 x2 - 6x + 28.