- \(
\left( {x^2 - x - 2} \right)^2 - x^3 = 10
\)
\(
\eqalign{
& \left( {x^2 - x - 2} \right)^2 - x^3 = 10 \cr
& \left( {x^2 - x - 2} \right)\left( {x^2 - x - 2} \right) - x^3 = 10 \cr
& x^4 - x^3 - 2x^2 - x^3 + x^2 + 2x - 2x^2 + 2x + 4 - x^3 = 10 \cr
& x^4 - 3x^3 - 3x^2 + 4x - 6 = 0 \cr
& \left( {x^2 - x + 1} \right)\left( {x^2 - 2x - 6} \right) = 0 \cr
& x^2 - x + 1 = 0 \vee x^2 - 2x - 6 = 0 \cr
& x = 1 - \sqrt 7 \vee x = 1 + \sqrt 7 \cr}
\)