The image shows a geometric representation of the function f(x) = x2 - 2x - 6 written in standard form. What is this function written in vertex form? 2 +.X f(x) = (x-1)2 - 7 Of(x) = (x +1)2 - 7 Of(x) = (x - 1)2 - 5 f(x) = (x +1)2 - 5 -Xn DO 1 -X​