**Problem : **
Is the following conic a parabola, an ellipse, a circle, or a
hyperbola:
-3*x*
^{2} + *y* + 2 = 0
?

**Problem : **
Is the following conic a parabola, an ellipse, a circle, or a hyperbola:
2*x*
^{2} +3*xy* - 4*y*
^{2} + 2*x* - 3*y* + 1 = 0
?

**Problem : **
Is the following conic a parabola, an ellipse, a circle, or a hyperbola:
2*x*
^{2} -3*y*
^{2} = 0
?

**Problem : **
Is the following conic a parabola, an ellipse, a circle, or a hyperbola:
-3*x*
^{2} + *xy* - 2*y*
^{2} + 4 = 0
?

**Problem : **
Is the following conic a parabola, an ellipse, a circle, or a hyperbola:
*x* = 0
?