Question 838915
i could be wrong but i don't think you have enough information to solve this.


check the following references to see what i mean.


in both of these videos, you are either given both vertices and both focus points, or you are given the center of the equation and 2 focus points and another point on the ellipse.


either is enough information to generate the equation as the videos show.


<a href = "http://www.youtube.com/watch?v=6Rr3nSOxJIc" target = "_blank">http://www.youtube.com/watch?v=6Rr3nSOxJIc</>


<a href = "http://www.youtube.com/watch?v=JRbSpdKjklU" target = "_blank">http://www.youtube.com/watch?v=JRbSpdKjklU</>


the following reference from purplemath shows examples of finding the equation from information given.  information given is more than what you have.


<a href = "http://www.purplemath.com/modules/ellipse3.htm" target = "_blank">http://www.purplemath.com/modules/ellipse3.htm</a>


with the information you have, you can draw the line between the foci but nothing else.


bottom line is i don't think you have enough information.
check the problem statement again to see that you haven't missed anything.