Question 243722
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Sorry but

{{{-(x/6)^2 -(y/6)^2 = 1}}}

is not the equation of a hyperbola.  Both terms on the left
cannot be negative in the equation of a hyperbola. One of 
those terms on the left must be positive and the other 
negative.  Please correct and repost the problem, being 
very careful to get the signs right.

Edwin</pre>