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 sqrt((7+2t)^2+(-1-t)^2+(2+3t)^2)
expand sqrt((7+2t)^2+(-1-t)^2+(2+3t)^2)
Natural Language
Math Input
Extended Keyboard