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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 ` repesents an ellipse. Find eccentricity

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The correct Answer is:
Its eccentricity `= e = sqrt(1-(b^(2))/(a^(2))) = sqrt(1-(5)/(9))=(2)/(3)`.
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