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.
(1/400)*Transpose[Cofactor[{{1,2,3,4},{0,5,6,7},{0,0,8,9},{0,0,0,10}}]]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random