Question: The equation ax 2 + 6y 2 + 12y = 0 defines an ellipse if ________________. (a) a < 0 (b) a = 0 (c)

The equation ax2 + 6y2 + 12y = 0 defines an ellipse if ________________.

(a) a < 0

(b) a = 0

(c) a > 0

(d) a is any real number

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