Answer:
A. minimum at x = -2.
Step-by-step explanation:
Finding the derivative:
f'(x) = 12x.
12x = 0 for a maxim/ minimum.
x = 0.
As the second derivative (12) is positive, we have a minimum value when x = 0.
So the function has a minimum value where f(x) = 6(0)^2 -2 = -2.
