Thread: hyperbola, parabola,... determination

Let Σ be a subset of R^2
that is given by
x^2 + 3xy + 2y^2 + x + y = 0 in R^2.
Determine whether Σ is a hyperbola, or parabola, or ellipse or something else

Originally Posted by abrahamtim

Let Σ be a subset of R^2
that is given by
x^2 + 3xy + 2y^2 + x + y = 0 in R^2.
Determine whether Σ is a hyperbola, or parabola, or ellipse or something else

Don't you have class notes or a textbook that tells you what to do? What have you tried? Where are you stuck.