(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the second derivative of 4x^2 + 3x - 9y^2. Answer in terms of y.

2. Relevant equations

All derivative formulas.

3. The attempt at a solution

[PLAIN]http://http://i52.tinypic.com/2w2ptex.jpg [Broken]

I can't get much further than this; the thing that gets me is how to put everything in terms of y. Help? Thanks!

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# Homework Help: Second Derivative in Terms of Y

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