Question 440669
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Hi
 Standard Form of an Equation of an Ellipse is {{{(x-h)^2/a^2 + (y-k)^2/b^2 = 1 }}}
where Pt(h,k) is the center and a and b  are the respective vertices distances from center.
ellipse with foci (0, ± 2) and co-vertices at (± 1, 0).
{{{(x-h)^2/a^2 + (y)^2/1^2 = 1 }}}
f = {{{ sqrt(a^2-b^2) = 2}}} a^2 = 5
{{{(x)^2/5 + (y)^2/1= 1 }}}