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Re: plot hyperbola


In[1]:=
<<Graphics`ImplicitPlot`

In[2]:=
ImplicitPlot[x^2/a^2+y^2/b^2==1/.{a->2,b->1},{x,-2,2},{y,-1,1}]

This will give you the plot that you need, and is the easiest way to do
it.  Implict plot will acctually sove the quation at each point and
plot all solutions to the problem.


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