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.
sqrt((x+21)^2-3^2) for x={1,2,3,4,5,6,7,8,9}
sqrt((x+21)^2-3^2) for x={1,2,3,4,5,6,7,8,9}
Natural Language
Math Input
Extended Keyboard