The image shows a geometric representation of the function f(x) = x2 – 2x – 6 written in standard form. an algebra tile configuration. only the product spot is shown. 9 tiles are in the product spot: 1 + x squared, 2 negative x, 6 negative. what is this function written in vertex form? f(x) = (x –1)2 – 7 f(x) = (x +1)2 – 7 f(x) = (x –1)2 – 5 f(x) = (x +1)2 – 5