\[\boxed{\text{1056\ (1056).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\left( x^{2} + x \right)^{4} - 1 = 0\]
\[\left( x^{2} + x \right)^{4} = 1\]
\[x^{2} + x = \pm 1\]
\[1)\ x² + x - 1 = 0\]
\[D = 1 + 4 = 5,\]
\[x_{1} = \frac{- 1 + \sqrt{5}}{2},\]
\[x_{2} = \frac{- 1 - \sqrt{5}}{2}.\]
\[2)\ x² + x + 1 = 0\]
\[D = 1 - 4 = - 3 < 0 \Longrightarrow корней\ \]
\[нет.\]
\[Ответ:\ x = \frac{- 1 + \sqrt{5}}{2};\ \ \]
\[x = \ \frac{- 1 - \sqrt{5}}{2}.\]