Originally Posted by

**avahdon** Hi, I'm beginner to calculus and I forgot my algebra because I stop my study for years. Now I don't know what next after I plug the value to the formula of quotient rule in derivate.

This is the given.

$\displaystyle y = \frac{x^3}{(x^2+4)^2}$

Then I think this is the derivative of the given function, but how to solve or factor or simplify this?

$\displaystyle = \frac{(x^2+4)^2(3x^2)-(x^3)2(x^2+4)(2x)}{((x^2+4)^2)^2}$

If you can show me the full solution then explain what process did you do, it will help me alot. Thanks