$$\left. \begin{array} { l } { x ^ { 3 } - x ^ { 2 } - x - 1 } \\ { x = - 1 x = - 10 } \end{array} \right.$$
$y=-1$
$$x+x=0$$
$$2x=0$$
$$x=0$$
$$y=0^{3}-0^{2}-0-1$$
$$y=0-0^{2}-0-1$$
$$y=0-0-0-1$$
$$y=0+0-0-1$$
$$y=-0-1$$
$$y=0-1$$
$$y=-1$$
$$x=0$$ $$y=-1$$
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