4x^2+y^2=9 is it a circle
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No, it is not a circle. the eqn of the circle is of the form (x-a)^2 + (y-b)^2 = c^2, centered around (a,b) and radius c.
Here, the eqn is of the form x^2 + y^2/4 = 9/4, which is the equation of an ellipse, not a circle.
Here, the eqn is of the form x^2 + y^2/4 = 9/4, which is the equation of an ellipse, not a circle.
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