Write the centre and eccentricity of the ellipse 3x2 + 4y2 – 6x + 8y – 5 = 0

Given that we need to find the centre and eccentricity of the ellipse 3x2 + 4y2 - 6x + 8y - 5 = 0.



3x2 + 4y2 - 6x + 8y - 5 = 0


3(x2 - 2x + 1) + 4(y2 + 2y + 1) = 12


3(x - 1)2 + 4(y + 1)2 = 12




Comparing with the standard form


Centre = (p,q) = (1, - 1)


Here a2>b2


eccentricity(e) =





3