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.
max(2a^2+2b^2+2c^2+ac-bc)/(a^2+b^2+c^2)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random