x^4+x^3-x^2-9x=0

Solution for x^4+x^3-x^2-9x=0 equation:

Simplifying
x4 + x3 + -1x2 + -9x = 0

Reorder the terms:
-9x + -1x2 + x3 + x4 = 0

Solving
-9x + -1x2 + x3 + x4 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), 'x'.
x(-9 + -1x + x2 + x3) = 0

Subproblem 1
Set the factor 'x' equal to zero and attempt to solve:

Simplifying
x = 0

Solving
x = 0

Move all terms containing x to the left, all other terms to the right.

Simplifying
x = 0
Subproblem 2
Set the factor '(-9 + -1x + x2 + x3)' equal to zero and attempt to solve:

Simplifying
-9 + -1x + x2 + x3 = 0

Solving
-9 + -1x + x2 + x3 = 0

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.
Solution
x = {0}