Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
find the foci of ((x-5)^2 /25) + ((y+3)^2 /9) = 1
find the foci of ((x-5)^2 /25) + ((y+3)^2 /9) = 1
Natural Language
Math Input
Extended Keyboard
