Question

What are the critical numbers of the function:

f(x)=2x^3-3x^2-36x+14

Thanks
Reiny
Nothing nice going on here

I tried, x = ±1, ±2, ±7, ±7/2, then gave up
ran it through Wolfram and got this

http://www.wolframalpha.com/input/?i=2x%5E3-3x%5E2-36x%2B14%3D0