- #1

- 15

- 0

^{2}+4)/(t

^{2}+4)

^{2}

and using the quotient rule + the chain rule I got this mess:

**dy/dx= -2t(t^2+4)^2-2t(2t**

^{2}+8)(t^{2}+4)^{2}/ (t^{2}+4)^{4}and now I have to set that whole thing to 0. I know the numerator must be equal to 0 which mean that one of the solution is t=0. Is there any other solutions?Can you help me simplify/factor it to find the other solution?Thank you