Which of these is a solution to y′′+4y′+4y=0y'' + 4y' + 4y = 0y′′+4y′+4y=0?
y=xe−2xy = xe^{-2x}y=xe−2x
y=xe2xy = xe^{2x}y=xe2x
y=e−2xy = e^{-2x}y=e−2x
y=e2xy = e^{2x}y=e2x