# An integral

1. Jul 5, 2010

### 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

2. Jul 5, 2010

### Dickfore

Use Euler substitution:

$$\sqrt{2a + x^{2}} = x - t$$

3. Jul 5, 2010

Thanks :)