1, 3
-1, -3
1, -3
-1, 3
Correct answer is A
f(x)=3x2−12x+12 and f(x)=3
∴
3x^{2} - 12x + 9 = 0; 3x^{2} - 9x - 3x + 9 = 0
3x(x - 3) - 3(x - 3) = (3x - 3)(x - 3) = 0
3x - 3 = 0 or x - 3 = 0
x = 1 or 3
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