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.
4a*x[t] * x''[t] + 2a x'[t]^2 ==0
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random