Sorry about that,
so f(x -1)
= 3 (x - 1)^2 - 4(x - 1) - 3
FOIL the first set (x - 1)(x - 1) = x^2 - 2x + 1 then multiply it by 3
3x^2 - 6x + 3
distribute the -4 so -4x + 4
you now have 3x^2 - 6x + 3 - 4x + 4 - 3
combine like terms
final answer: 3x^2 - 10x + 4