I've been messing with this question for the past hour. I REALLY NEED HELP. Given: f(x) = x^3 - x^2 - 20x + 4 .... find all numbers "C" that verify Rolle's terrible theorem. I'm extremely desperate and my blood pressure is abnormally high. Please.

Question

anonymous · Answer

ill show you my work. Not trying to get around doing this problem.

anonymous · Answer

f'(x) = 3x^2 - 2x - 20
and
f(0) = f(5)

anonymous · Answer

I guess I should mention the interval in question is [0, 5]

anonymous · Answer

I plugged the correct values into the quadratic formula. and i get [2 +/- sqrt(244)] / 6

anonymous · Answer

My online homework site has not accepted a single answer I have tried. Can you sense my frustration?