tolong dong jawab secepatnya,sama caranya yah...no 30

f(x) = (2x^3 - 2x^2 + x + 4)^5
f'(x) = 5(2x^3 - 2x^2 + x + 4)^4 . (6x^2 - 4x + 1)
f'(-1) = 5(2(-1)^3 - 2(-1)^2 + (-1) + 4)^4 . (6(-1)^2 - 4(-1) + 1)
= 5(-2 - 2 - 1 + 4)^4 . (6 + 4 + 1)
= 5(-1)^4 . (11)
= 5 (1) (11)
= 55