Hi, I have to solve the following equation;

$\displaystyle xy'' + (4-2x)y' + (x-4)y = 0$

I have been given $\displaystyle y=e^x$ as a solution and have been asked to find the general solution. My instinct is to use reduction of order. I have checked the solution on wolfram but can't seem to get there. Any ideas?

Cheers,

Ben