Определите коэффициенты квадратного уравнения \(\displaystyle -x^2-x=0 {\small.}\)

\(\displaystyle a=\)[ ]\(\displaystyle {\small;}\)    \(\displaystyle b=\)[ ]\(\displaystyle {\small;}\)    \(\displaystyle c=\)[ ]\(\displaystyle {\small.}\)