Evaluate f'(x) at the following points

Question

Let f(x)=4x^3(x^2-7). Evaluate f'(x) at the following points

a) f'(2)

b)f'(-12)

I'm not sure how to solve this problem, please help

thank you

Answer 1

f'(x) = 4x^3(2x) + (x^2-7)(12x^2)

f'(2 = 128- 144= -16

f'(-12) = 8(12^4) + 12^5 - 7(144) = 413,712