It would make no difference if you are standing still or driving the vehicle. You want to ensure you have the heater wide open when you do it to ensure you are getting the old fluid from the heater core as well as the engine. Driving the vehicle around will probably allow the process to happen a little faster, as you engine will get up to operating temperature faster. The real thing you are trying to accomplish is to get the thermostat open to allow everything to circulate.

Flushing coolant after driving only with water in
I am trying to understand how to determine the linear dependence/independence of a set of complex vectors.  I know the process is the same as determining linear dependence/independence of a set of real vectors, but I am a little confused on how to augment the sets of vectors.  For instance if I have
$$
\begin{bmatrix} 2 + i \\ 1 \end{bmatrix}, \begin{bmatrix} 1 \\ 1 - i \end{bmatrix}
$$
I know when expanded out into the real and complex parts I have
$$
\begin{bmatrix} 2 \\ 1 \end{bmatrix} + i\begin{bmatrix} 1 \\ 0 \end{bmatrix} , \begin{bmatrix} 1 \\ 1 \end{bmatrix} + i\begin{bmatrix} 0 \\ -1 \end{bmatrix}
$$
For the augmented matrix do I just use the original set of vectors like the following?
$$
\left[\begin{array}{cc|c} 2 + i &amp; 1 &amp; 0\\ 1 &amp; 1 - i &amp;0\end{array}\right]
$$
or do I some how have to use the expanded set of vectors?

Any help would be greatly appreciated.
