equations of motion

1. The problem statement, all variables and given/known data

A particle of mass m moves freely in space in the x direction.

(a) Derive equations of motion for the following operator expectations:



<x(t)>, <p(t)> , <X^2(t)>,<P^2(t)>





2. Relevant equations







3. The attempt at a solution



baah I dont even know....

I guess we'll start from the equation of motion d<x(t)>/dt = 1/ih <[X(t),H]> + <dx(t)/dt>

but how do I find the average of dx(t)/dt?



thanks!