Second order differential equation

[Mugged]

Hi, i need help solving this equation:

$$y'' + 4y' + 4y = 0$$

any help is appreciated!

 

[rock.freak667]

Hi, i need help solving this equation:

$$y'' + 4y' + 4y = 0$$

any help is appreciated!

What attempt have you made?

Here is a hint: For a 2nd order DE with constant coefficients, try using y=e^mx as a trial solution.