Graph the Hyperbola (y + 2)^2/4 - (x - 1)^2/9 = 1

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Graph the Hyperbola (y + 2)^2/4 - (x - 1)^2/9 = 1
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really easy once properly and simply explained, thanks!

MRpickleYandR
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so, the sign will determined the type whether is an ellipse or hyperbola?
... now it makes more sense to me..

maoqu