How do you find the critical points of #d'(x)=x^2+2x-4#?
We know that a function
#f'(x) = 0# #f'(x)#is undefined.
So, let's look for such cases in our function here. We've been given the derivative
Note that since
Since this doesn't factor, we'll need to use the quadratic formula:
Some quick simplification/cleaning up gives:
And there's your answers.
Hope that helped :)