X^3-2x^2-21x=0

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Solution for X^3-2x^2-21x=0 equation:


Simplifying
X3 + -2x2 + -21x = 0

Reorder the terms:
X3 + -21x + -2x2 = 0

Solving
X3 + -21x + -2x2 = 0

Solving for variable 'X'.

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

Add '21x' to each side of the equation.
X3 + -21x + 21x + -2x2 = 0 + 21x

Combine like terms: -21x + 21x = 0
X3 + 0 + -2x2 = 0 + 21x
X3 + -2x2 = 0 + 21x
Remove the zero:
X3 + -2x2 = 21x

Add '2x2' to each side of the equation.
X3 + -2x2 + 2x2 = 21x + 2x2

Combine like terms: -2x2 + 2x2 = 0
X3 + 0 = 21x + 2x2
X3 = 21x + 2x2

Simplifying
X3 = 21x + 2x2

Reorder the terms:
X3 + -21x + -2x2 = 21x + -21x + 2x2 + -2x2

Combine like terms: 21x + -21x = 0
X3 + -21x + -2x2 = 0 + 2x2 + -2x2
X3 + -21x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
X3 + -21x + -2x2 = 0

The solution to this equation could not be determined.

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