Solve the differential equation for the motion of the spring $$648\frac{d^2x}{dt^2}+648 \frac{dx}{dt} + 162 x = 0$$ if
$x(0) = -6$
$\frac{dx}{dt}\Big\vert_{t=0}=5$

$x(t) =$
This spring is critically damped, will it go past equilibrium?