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{l1%2FT1^2 %3D %28l1 %2B0.7%29%2FT2^2%2Cl1}
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random