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.
(6378000+y)*(6378000+y) - 2*6378000*6378000 = 0
(6378000+y)*(6378000+y) - 2*6378000*6378000 = 0
Natural Language
Math Input
Extended Keyboard