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.
2y+4z>0 and -2y-2z>0 and -4y-z>0
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
