Question: How Do I Graph an Equation, Implicit Form

I have the equation x^4=4(4x^2-y^2), and I keyed in maple

>with (plots):
>eq:=x^4=4*(4*x^2-y^2);

and recieve in response x^4=4. 

I want to get eq:=x^4=4(4x^2-y^2), in order to find and graph all possible tangents in the event that y=3 and to find the point of intersection for the tangents that lie in the first quadrant. 

Thanks 

 

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