Which of the following differential equations can be solved by finding a characteristic equation and solving for the roots to get a general solution?
y" - 3xy' + 2y = 0; y(0) = 2, y'(0) = 0
1) y'' - 3xy' + 2y = 0
2) y'' + 3xy' - 2y = 0
3) y'' + 3xy' + 2y = 0
4) y'' - 3xy' - 2y = 0