In this problem you may have to convert the equations to standard form first before recognizing what kind of graph they have. Indicate whether the following equations define a straight line (L), a circle (C), an ellipse (but not a circle) (E), a parabola (P), or a hyperbola (H).
1. $x^2+4x+y^2+6y+9=0$
2. $x^2+4x-y^2-6y+9=0$
3. $3x+4y=5$
4. $2x^2+y^2-1=0$
5. $y = 2x^2-3x+4$

Hint: If you don't recognize the type of equation right away convert it to standard form by completing the square.