The vertex of an ellipse whose major axis is on the X axis is (0,-root number 5), and b= root number 5.

E = c/a = 6/6 square root of 6/6

c^2/a^2= 1/6

(a^2-b^2)/a^2= 1/6

1-5/a^2= 1/6

a^2=6

The equation x 2/6+y 2/5 =1.