Question

Find the equation of an ellipse with vertices (3, 0) and (-3, 0) and foci of (2, 0) and (-2, 0).

I dont know which formula to use!!!

Answer 1

Should i use the Major Axis Horizontal Formula? \[\frac{ (x-h)^{2} }{ a ^{2} }+\frac{ (y-k)^{2} }{ b ^{2} }\]

Answer 2

Or the Major Axis Vertical Formula?
\[\frac{ (x-h)^{2} }{ b ^{2} }+\frac{ (y-k)^{2} }{ a ^{2}}\]

Answer 3

How do you know when to use which formula? Please I really need help on this!