Question
$$(x^2-6)(x^2+9) = 0$$
Answer
This equation has no solution.
Explanation
$$ \begin{aligned} (x^2-6)(x^2+9) &= 0&& \text{simplify left side} \\[1 em]x^4+9x^2-6x^2-54 &= 0&& \\[1 em]x^4+3x^2-54 &= 0&& \\[1 em] \end{aligned} $$
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