ANYBODY SMART WANT TO HELP! :find the critical points: s(t)= (t-1)^4 (t+5)^3

I FOUND THE CRITICAL POINT BUT NOW I HAVE A PROBLEM WITH THE Y VALUES.

Question

ANYBODY SMART WANT TO HELP! :find the critical points:  s(t)= (t-1)^4 (t+5)^3

I FOUND THE CRITICAL POINT BUT NOW I HAVE A PROBLEM WITH THE Y VALUES.

anonymous · Answer

THE CRITICAL POINTS ARE 1, -5 AND -17/7 CORRECT?

anonymous · Answer

SO FOR THE THIRD CRITICAL POINT I HAVE A HUGE NUMBERRRRRR AND IT DOESN'T MAKE SENSE.

anonymous · Answer

http://openstudy.com/study#/updates/5141608fe4b0d5d99f3e764a

anonymous · Answer

YES CORRECT. BUT HOW DO I FIND THE Y-VALUES

anonymous · Answer

I KNOW I REPLACE THE X INTO THE ORIGINAL PROBLEM.... BUT FOR THE THIRD CRITICAL  POINT I GET A NUMBER THAT IS WRONGGG.