Graphing Cubic and Cube root Functions (I need Help)

Ineed to know the answer to this algebra question.

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

G. how many different 6-letter arrangements can be formed using the letters in the word absent, if each letter is used only once? a. 6 b. 36 c. 720 d. 46,656