Question
$$-5000+10000x+30000x^2-40000x^3 = 0$$
Answer
This equation has no solution.
Explanation
$$ \begin{aligned} -5000+10000x+30000x^2-40000x^3 &= 0&& \text{simplify left side} \\[1 em]-40000x^3+30000x^2+10000x-5000 &= 0&& \\[1 em] \end{aligned} $$
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