How to do I solve this problem? #3x^2-12=0#
I can't remember how to do these and just need step by step so I can finish the problem. This is only a portion of my calculus problem but I forget how to do this part. The whole problem is f(x) = x^3-12x+17 find the relative extreme points of the function if they exist. I did the first part and found the derivatives of the problem but now I am stuck at the next step which is what I posted for my question. It's been years since I took algebra so I forget. Thanks!
I can't remember how to do these and just need step by step so I can finish the problem. This is only a portion of my calculus problem but I forget how to do this part. The whole problem is f(x) = x^3-12x+17 find the relative extreme points of the function if they exist. I did the first part and found the derivatives of the problem but now I am stuck at the next step which is what I posted for my question. It's been years since I took algebra so I forget. Thanks!
1 Answer
Explanation:
You need to factor
#3(x+2) (x-2)#
and then set each of these (but ignore the
#x+2=0#
#x+2- 2 = 0 - 2#
#x=-2#
and
#x-2=0#
#x-2+2=0+2#
#x=2#
So
