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.
Plot3D[4*x^2+4*y^2-4*x*y-12*x, {x, -5, 5}, {y, -5, 5}]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random