{{1,0,0},{-1,1,0},{0,0,1}}{{1,0,0},{0,1,0},{2,0,1}}{{1,0,0},{0,1,0},{0,-4,1}}

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.