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{{1,2,-3,4},{-2,3,1,-1},{-1, -2, 2, 2}, {0, -6, -2, -2}}
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random