3x^3+9x+3+21x=0

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Solution for 3x^3+9x+3+21x=0 equation: 


Simplifying
3x3 + 9x + 3 + 21x = 0

Reorder the terms:
3 + 9x + 21x + 3x3 = 0

Combine like terms: 9x + 21x = 30x
3 + 30x + 3x3 = 0

Solving
3 + 30x + 3x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(1 + 10x + x3) = 0

Ignore the factor 3.

Subproblem 1
Set the factor '(1 + 10x + x3)' equal to zero and attempt to solve:

Simplifying
1 + 10x + x3 = 0

Solving
1 + 10x + x3 = 0

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.

The solution to this equation could not be determined.

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