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) =
⇒
⇒
⇒