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Show that the equation 5x^(2) + 9y^(2) ...

Show that the equation `5x^(2) + 9y^(2) - 10 x + 90 y + 185 = 0 ` represents an ellipse. Find the co-ordinates of it's center

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The correct Answer is:
The coordinates of its centre are `(alpha , beta)` i.e., (1,5) .
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