Integral Help: Solving $\int \frac{1}{(a+x^2)\sqrt{2a+x^2}}\,dx$

[Identity]

It's been a while since I've done much integration, could someone please give me a hint with:

\int \frac{1}{(a+x^2)\sqrt{2a+x^2}}\,dx

Thanks

 

[Dickfore]

Use Euler substitution:

<br /> \sqrt{2a + x^{2}} = x - t<br />

 

[Identity]

Thanks :)