classify the graph of 3x^2 + 6x - 4y +12 = 0

A. Circle
B. Hyperbola
C. Ellipse
D. Parabola
E. None

ok so i started out pulling out a 3 and did completing the square, so i have:

3(x^2 +2x + 1) -4y = -9

then simplified

3(x+1)^2 -4y = -9

now what do i do -.-

ah, didn't see 4y

This post was edited by Frozen on Jun 5 2011 04:16pm

I suck at Math personally so take this with a grain of salt...
Al I did was isolate the "Y" and entered remaining equation in calc.... Its a parabola like that. I think the "x2" is the giveaway though

parabola
lul
didnt c the x^2

This post was edited by mnt on Jun 5 2011 04:17pm

it's not circle, not elipse and not hyperbola

I guess it's either none or parabola

lol'd

could you guys tell me why it isn't a circle or ellipse or hyperbola?

A x C > 0 - Circle (x-p)^2 + (y-q)^2 = r^2

Ellipse - x^2/a^2 + y^2/b^2 = 1

Hyperbola the same as ellipse, but - instead of +

a circle will have a x^2 and a y^2, ellipses are also more complicated.

It IS a hyperbola IMO