## Partial Fractions

Hi I need some help getting started with this integral

$$\int \frac {x^2+5x+2}{{x^4+x^2+1}}dx$$

 Admin Try working the denominator - $$x^4+x^2+1 = (x^4+2x^2+1)-x^2$$ then use the identity $$x^2-y^2 = (x+y)(x-y)$$
 Admin You were on the right track. To eliminate the $$x^3$$ term, C=-A. Then find 3 equations in three unknowns A, B, D.