Question 1198938
<pre>
Get the equation in standard form with the center as the center: 

{{{x^2/a^2+y^2/b^2=1}}} if a > b or {{{x^2/b^2+y^2/a^2=1}}} if a < b

{{{matrix(3,1,9x^2 + 36y^2=324,
9x^2/324^"" + 36y^2/324^""=324^""/324^"",
x^2/36^""+y^2/9^""=1)}}}

So a<sup>2</sup> = __, and a = __,
   b<sup>2</sup> = __, and b = __

For all ellipses, {{{eccentricity=e= c/a}}} where {{{c^2=a^2-b^2}}}

{{{matrix(10,1,

c^2=a^2-b^2,
c^2="__"^2-"__"^2,
c^2="__"-"__",
c^2="__",
"",
c=sqrt("__"),
"",
c=sqrt("__"*"__"),
"",
c="__"sqrt("__")))}}}

The foci are + or - c units left and right from the center (the origin).

The foci are (__,__) and (__,__).

For the eccentricity:

{{{matrix(5,1,
e=c/a,
"",
e=("__"*sqrt("__")/("__")),
"",
e="?"



)}}}

Edwin</pre>