\[x^{2}(x + 1) + (x + 4) = 4\]
\[x^{2}(x + 1) + x + 4 - 4 = 0\]
\[x^{2}(x + 1) + x = 0\]
\[x\left( x(x + 1) + 1 \right) = 0\]
\[x = 0;\ \ \ \ x(x + 1) + 1 = 0\]
\[\text{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }x^{2} + x + 1 = 0\]
\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ D = 1 - 4 = - 3 < 0\]
\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ нет\ корней\]
\[Ответ:число\ \ 0.\]