X^3+9x^2+21x+13=0

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Solution for X^3+9x^2+21x+13=0 equation:


Simplifying
X3 + 9x2 + 21x + 13 = 0

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

Solving
13 + X3 + 21x + 9x2 = 0

Solving for variable 'X'.

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

Add '-13' to each side of the equation.
13 + X3 + 21x + -13 + 9x2 = 0 + -13

Reorder the terms:
13 + -13 + X3 + 21x + 9x2 = 0 + -13

Combine like terms: 13 + -13 = 0
0 + X3 + 21x + 9x2 = 0 + -13
X3 + 21x + 9x2 = 0 + -13

Combine like terms: 0 + -13 = -13
X3 + 21x + 9x2 = -13

Add '-21x' to each side of the equation.
X3 + 21x + -21x + 9x2 = -13 + -21x

Combine like terms: 21x + -21x = 0
X3 + 0 + 9x2 = -13 + -21x
X3 + 9x2 = -13 + -21x

Add '-9x2' to each side of the equation.
X3 + 9x2 + -9x2 = -13 + -21x + -9x2

Combine like terms: 9x2 + -9x2 = 0
X3 + 0 = -13 + -21x + -9x2
X3 = -13 + -21x + -9x2

Simplifying
X3 = -13 + -21x + -9x2

Reorder the terms:
13 + X3 + 21x + 9x2 = -13 + -21x + -9x2 + 13 + 21x + 9x2

Reorder the terms:
13 + X3 + 21x + 9x2 = -13 + 13 + -21x + 21x + -9x2 + 9x2

Combine like terms: -13 + 13 = 0
13 + X3 + 21x + 9x2 = 0 + -21x + 21x + -9x2 + 9x2
13 + X3 + 21x + 9x2 = -21x + 21x + -9x2 + 9x2

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

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

The solution to this equation could not be determined.

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