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.
expand[ (x+b/(2 a))^2 - (b b-4 a c)/(4 a a) ]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
