Find the second derivative f′′(x)f''(x)f′′(x) for f(x)=5x3−x2f(x) = 5x^3 - x^2f(x)=5x3−x2.
15x2−2x15x^2 - 2x15x2−2x
30x−230x - 230x−2
30x30x30x
10x−210x - 210x−2