I don't understand what you were taught . . .In the following I determined the value of to be 6 . How?
but I can't find the value of . Really?
and therefore cannot find the value of
Find the coordinates of the foci of an ellipse centred at the origin,
whose vertices have the coordinates: (8, 0) and (0, -4).
The center is at the origin:
. . So the vertices are at: .
This tell us immediately that: .
And is given by: .