[SOLVED] Quadrature formula help

Hello,

I have to determine a quadrature formula of this shape:

http://i48.tinypic.com/2zsn02f.jpg

with maximum degree of precision.

I can't find any examples to start me off. I looked at some of the polynomials they use in examples to start off (Legendre, Laguerre etc.) but can't find one that matches, or even an example like this...

Can anyone walk me through the solution, or at least start me off (what's the maximum precision, which polynomial do I start with)

Thanks!