solve the problem if correct you get brainliest answer.

Answer:
a= 3
b = -6
c = -1
Step-by-step explanation:
Let's start by expanding, since the original is not in a condensed form.
3(x-1)² - 4
3(x-1)(x-1) - 4
(x-1)(x-1) = x²-2x+1
3(x²-2x+1) - 4
3x²-6x+3-4
3x²-6x-1
a= 3
b = -6
c = -1