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.
plot 4/(1/sqr((x-1)^2+(y-1)^2)+1/sqr((x-1)^2+(y+1)^2)+1/sqr((x+1)^2+(y-1)^2)+1/sqr((x+1)^2+(y+1)^2))=1.365
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random