A good first step is to complete the square on each of the variables.

factoring and completing the square we get.

factoring and combining like terms

divide everything by 6 to put into standart form.

This is the standard form of a hyperbola.

The foci can be found using the equation c=foci

so the foci are at

they are located at the points

The asymptotes of the hyperbola can be found with the equation

Good luck.

P.S. The formula for foci is different for each conic section.