4y(x) + y''(x) = x
This one is very similar to my previous equation, but it has complex numbers in characteristic equation \(\displaystyle \L\\r^{2}+4=0\). How do I calculate them?
This one is very similar to my previous equation, but it has complex numbers in characteristic equation \(\displaystyle \L\\r^{2}+4=0\). How do I calculate them?