# Math Help - Help please with this derivative

1. ## Help please with this derivative

Y'=-x^2 +2 /(x^2 + 2)^2

need 2nd derivative for concavity

I need it for roots so i only need the top(numerator) i get to a certain point but cant seem to factor it... ughh

please help

2. Originally Posted by Calculus23
Y'=-x^2 +2 /(x^2 + 2)^2

need 2nd derivative for concavity

I need it for roots so i only need the top(numerator) i get to a certain point but cant seem to factor it... ughh

please help
what is the original function, y ?