Which differential equation has the solution y=C1e2x+C2e−2xy = C_1 e^{2x} + C_2 e^{-2x}y=C1e2x+C2e−2x?
y′′−2y=0y'' - 2y = 0y′′−2y=0
y′′−4y=0y'' - 4y = 0y′′−4y=0
y′′+4y=0y'' + 4y = 0y′′+4y=0
y′′−4y′+4y=0y'' - 4y' + 4y = 0y′′−4y′+4y=0