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.
solve([a^2+b*c=a,a*b+b*d=b,a*c+c*d=c,d^2+b*c=d],[a,b,c,d])
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random