X^3-9x^2+11x+21=

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Solution for X^3-9x^2+11x+21= equation:


Simplifying
X3 + -9x2 + 11x + 21 = 0

Reorder the terms:
21 + X3 + 11x + -9x2 = 0

Solving
21 + X3 + 11x + -9x2 = 0

Solving for variable 'X'.

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

Add '-21' to each side of the equation.
21 + X3 + 11x + -21 + -9x2 = 0 + -21

Reorder the terms:
21 + -21 + X3 + 11x + -9x2 = 0 + -21

Combine like terms: 21 + -21 = 0
0 + X3 + 11x + -9x2 = 0 + -21
X3 + 11x + -9x2 = 0 + -21

Combine like terms: 0 + -21 = -21
X3 + 11x + -9x2 = -21

Add '-11x' to each side of the equation.
X3 + 11x + -11x + -9x2 = -21 + -11x

Combine like terms: 11x + -11x = 0
X3 + 0 + -9x2 = -21 + -11x
X3 + -9x2 = -21 + -11x

Add '9x2' to each side of the equation.
X3 + -9x2 + 9x2 = -21 + -11x + 9x2

Combine like terms: -9x2 + 9x2 = 0
X3 + 0 = -21 + -11x + 9x2
X3 = -21 + -11x + 9x2

Simplifying
X3 = -21 + -11x + 9x2

Reorder the terms:
21 + X3 + 11x + -9x2 = -21 + -11x + 9x2 + 21 + 11x + -9x2

Reorder the terms:
21 + X3 + 11x + -9x2 = -21 + 21 + -11x + 11x + 9x2 + -9x2

Combine like terms: -21 + 21 = 0
21 + X3 + 11x + -9x2 = 0 + -11x + 11x + 9x2 + -9x2
21 + X3 + 11x + -9x2 = -11x + 11x + 9x2 + -9x2

Combine like terms: -11x + 11x = 0
21 + X3 + 11x + -9x2 = 0 + 9x2 + -9x2
21 + X3 + 11x + -9x2 = 9x2 + -9x2

Combine like terms: 9x2 + -9x2 = 0
21 + X3 + 11x + -9x2 = 0

The solution to this equation could not be determined.

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