Ex 6: Determine Higher Order Derivatives Requiring the Quotient Rule

This video provides an example of how to determine the first and second derivative of function that requires the quotient rule.

[katelynvalles]

Does this apply to the function:

-2x/(x^2+4)^2 ?

That was the first derivative. I applied the same rule that you did here to get the second derivative, but the answer doesn't look right.