$$x^3+5x^2+4x-4 = 1$$
Answer
$$ \begin{matrix}x_1 = 0.65109 & x_2 = -2.27389 & x_3 = -3.3772 \end{matrix} $$
Explanation
$$ \begin{aligned} x^3+5x^2+4x-4 &= 1&& \text{move all terms to the left hand side } \\[1 em]x^3+5x^2+4x-4-1 &= 0&& \text{simplify left side} \\[1 em]x^3+5x^2+4x-5 &= 0&& \\[1 em] \end{aligned} $$
This polynomial has no rational roots that can be found using Rational Root Test.
Roots were found using qubic formulas.
This page was created using
Polynomial Equations Solver