Hello so I'm supposed to find the derivative of (-t(adsbygoogle = window.adsbygoogle || []).push({}); ^{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

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# Homework Help: Finding derivative and solve for t

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