Solve the system

$\frac{dx}{dt}=\left[\begin{array}{ccc}-1& -1& 1\end{array}\right]$

$2x$

with $x(0)=\left[\begin{array}{c}-1\end{array}\right]$

$-1$

Give your solution in real form.

$x_1=$

$x_2=$

An ellipse with counterclockwise orientation

Describe the trajectory.