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.
plot 3 x_1^2 + 4 x_1 x_2 + x_2^2
plot 3 x_1^2 + 4 x_1 x_2 + x_2^2
Natural Language
Math Input
Extended Keyboard
