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.
-sqrt(16-x^2)+sqrt(144-x^2)-8 = 0.000025125
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
