x^4+3x^3-5x^2-15x=0

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Solution for x^4+3x^3-5x^2-15x=0 equation: 


Simplifying
x4 + 3x3 + -5x2 + -15x = 0

Reorder the terms:
-15x + -5x2 + 3x3 + x4 = 0

Solving
-15x + -5x2 + 3x3 + x4 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), 'x'.
x(-15 + -5x + 3x2 + 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 '(-15 + -5x + 3x2 + x3)' equal to zero and attempt to solve:

Simplifying
-15 + -5x + 3x2 + x3 = 0

Solving
-15 + -5x + 3x2 + 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}

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