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.
解 y'' + 4y' + 4y = 0 。
解 y'' + 4y' + 4y = 0 。
Natural Language
Math Input
Extended Keyboard
