The centre of the ellipse `4x^(2) + 9y^(2) + 16x - 18y - 11 = 0` is

The centre of the ellipse 4x^(2) + 9y^(2) + 16 - 18y - 11 = 0 is

The coordinates of the centre of the ellipse 4x^(2) + 9y^(2) - 16 x + 18 y - 11 = 0 are _

The centre of the ellipse 4x^(2) + y^(2) - 8 x + 4y - 8 = 0 is

The centre of the ellipse 9x ^(2) + 25 y ^(2) - 18 x - 100 y - 116 = 0 is : a) (1,1) b) (-1,2) c) (-1,1) d) (1,2)

The centre of the ellipse 4x ^(2) + 9y ^(2) -16x-54y+61=0 is

The eccentricity of the ellipse 9x^(2) + 5y^(2) - 18x - 2y - 16 = 0 is

The coentre of the ellipse 4x ^(2) + 9y ^(2) -16x-54y+61=0 is

The centre of the ellipse 8x^2 + 6y^2 - 16x + 12y + 13 = 0

Find the centre foci and the equation of the directrices of the ellipse 8x^(2) +9y^(2) - 16x + 18 y - 55 = 0