Posted by Sandy on Tuesday, March 16, 2010 at 8:01pm.
4(x^2-2x+1) -(y^2 +4y+4)=-16
4(x-1)^2-(y+2)^2=-(4)^2
(x-1)^2/1- (y+2)^2/2^2=-1
Now this negative sign presents a problem, so
(y+2)^2/4^2 -(x-1)^2/2=1
check that.
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