What is the general solution to y′′−9y=0y'' - 9y = 0y′′−9y=0?
y=C1e3x+C2e−3xy = C_1 e^{3x} + C_2 e^{-3x}y=C1e3x+C2e−3x
y=C1cos3x+C2sin3xy = C_1 \cos 3x + C_2 \sin 3xy=C1cos3x+C2sin3x
y=(C1+C2x)e3xy = (C_1 + C_2 x) e^{3x}y=(C1+C2x)e3x
None