Determine d2y
----- for y=3x+2
dx^2 ------
5x-8

Here's a link that explains what differentiation is and how to do it.

Differentiation (Finding Derivatives)

In particular, this link shows how to differentiate polynomials:

5. Derivatives of Polynomials

Your post is a little discombobulated. I assume you want to find the second derivative of



We can try the quotient rule.





Now, find the derivative of that and you have it.

You could even use the product rule by rewriting as

May be a little easier.