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,-2},{-2,5}} ({{3,7},{5,3}} - {{2,6},{1,8}})
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random