## Indefinite integral help...

How can I evaluate $\int\frac{dx}{\sqrt{1-2x-x^2}}$ using inverse trig functions? Thanks.

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 Recognitions: Homework Help complete the square of the quadratic.
 Oh... thanks. Dang these are so hard... I wish I had the creativity to see the solution immediately like that...

## Indefinite integral help...

ax^2+bx+c, a=1, factor out the negative before you complete the square if you didn't remember.

 Thanks. I got the right answer after rock.freak667's hint. I just wish I were able to solve these more easily, without hints from this forum and elsewhere.... does it just take lots of practice, or what?