(Det[{{1,1,3,-1},{2,2,1,0},{1,0,0,-1},{0,3,-2,1}}])/(Det[{{1,-2,3,-1},{2,0,1,0},{1,1,0,-1},{0,1,-2,1}}])

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.