21x^3-6x^2+15=

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Solution for 21x^3-6x^2+15= equation: 


Simplifying
21x3 + -6x2 + 15 = 0

Reorder the terms:
15 + -6x2 + 21x3 = 0

Solving
15 + -6x2 + 21x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(5 + -2x2 + 7x3) = 0

Ignore the factor 3.

Subproblem 1
Set the factor '(5 + -2x2 + 7x3)' equal to zero and attempt to solve:

Simplifying
5 + -2x2 + 7x3 = 0

Solving
5 + -2x2 + 7x3 = 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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