The function

$3e^{-4x}cos(2x)$

is a solution to a second order linear homogenous differential equation with constant coefficients. Give the differential equation.

$y^{\text{'}\text{'}}+8y^{\text{'}}+20y=0$

$y^{\text{'}\text{'}}-8y^{\text{'}}+4y=0$

$y^{\text{'}\text{'}}+4y^{\text{'}}+25y=0$

$y^{\text{'}\text{'}}+6y^{\text{'}}+8y=0$

$y^{\text{'}\text{'}}+8y^{\text{'}}+4y=0$