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([[1,0.9,a],[0.9,1,0.8],[a,0.8,1]])} >= 0
{Det([[1,0.9,a],[0.9,1,0.8],[a,0.8,1]])} >= 0
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
