With converting vertex form to standard form : ) f(x) = 3(x − 2)^2 + 1 answers given f(x) = 3x^2 + 13 f(x) = 3x^2 − 12x + 13 f(x) = 3x^2 + 12x − 11 f(x) = 9x^2 − 36x + 37 if you could explain the steps that would be great. thx