Question
$$y^4 = 400$$
Answer
This equation has no solution.
Explanation
$$ \begin{aligned} y^4 &= 400&& \text{move all terms to the left hand side } \\[1 em]y^4-400 &= 0&& \\[1 em] \end{aligned} $$
This polynomial has no rational roots that can be found using Rational Root Test.
Roots were found using quartic formulas
This page was created using
Polynomial Equations Solver