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.
Inv[{{2+x,0,-1,0,0,0,-1,0},{0,2+x,0,-1,0,0,0,-1},{-1,0,2+x,0,-1,0,0,0},{0,-1,0,2+x,0,-1,0,0},{0,0,-1,0,2+x,0,-1,0},{0,0,0,-1,0,2+x,0,-1},{-1,0,0,0,-1,0,2+x,0},{0,-1,0,0,0,-1,0,2+x}}]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
