Posted by Marie on Thursday, May 12, 2011 at 8:37pm.
9(x^2-10x+25-25)-4y^2+189=0
9(x-5)^2-225-4y^2+189=0
9(x-5)^2-4y^2=36
(x-5)^2/2^2 - y^2/3^2=1 hyperbola
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