SOLUTION: Please help me with this. The directions say to Find is foci. Today in class we learned that the foci meant the same term as focus. I have been struggling with this problem.

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: Please help me with this. The directions say to Find is foci. Today in class we learned that the foci meant the same term as focus. I have been struggling with this problem.       Log On


   

Question 192405This question is from textbook
: Please help me with this.
The directions say to Find is foci.
Today in class we learned that the foci meant the same term as focus.
I have been struggling with this problem. We are dealing with graphing and working with conic sections: ellipses and hyperbolas.
This what I have tried so far.
x%5E2%2B9y%5E2=1
I tried dividing everything by one therefore I would get
x%5E2%2F1%2By%5E2%2F9=1
a=9
b=1
c=4+root+5
However it just isn't working out so I do not know if I have making a small mistake. This question is from textbook

Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
c%5E2=1%2B9
:
c=+sqrt%2810%29 c=-sqrt%2810%29
:
remember a%5E2=9 and b%5E2=1%29