Equation of an ellipse

Question

Find an equation of the ellipse that satisfies the given conditions. Foci (0,+-1), length of minor axis is 3.

Answer 1

minor axis =3

foci are (0,1) and (0,-1)

distances from a point on the ellipse to the foci sum to a constant

'x^2 + y^2/3.25 = 1

or

3.25x^2 +y^2 = 3.25

or

13x^2 +4y^2 = 13 is the equation with foci (0,+/-1) and minor axis=3 from (-1.5,0) to (1.5,0)