Question 860307
The center is at (0,0) according to your foci and co-vertices.  This makes identifying {{{c=5}}} and {{{b=4}}}, easy to do.  The "b" information will go under the {{{y^2}}} in your standard equation.  The reason is that b is for your co-vertices.  a is for your vertex (the main vertices).


The numbers, a, b, and c, are related according to {{{a^2+b^2=c^2}}}...


Can you finish this?