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.
det {{2,1,-1},{2,0,1},{-1,1,-3}}
det {{2,1,-1},{2,0,1},{-1,1,-3}}
Natural Language
Math Input
Extended Keyboard
