Find the second derivative of f(x)=x4−3x2f(x) = x^4 - 3x^2f(x)=x4−3x2.
12x2−612x^2 - 612x2−6
4x3−6x4x^3 - 6x4x3−6x
12x2−312x^2 - 312x2−3
24x24x24x