[SOLVED] Integral using residues 1. The problem statement, all variables and given/known data Show integral of 1/(x^4+x^2+1) from 0 to infinity equals (pi*sqrt(3))/6 using method of residues 2. Relevant equations 3. The attempt at a solution Tried to solve x^4+x^2+1=0. Don't get very useful numbers for poles.