(X^3-2x^2)-(9x+18)=0

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Solution for (X^3-2x^2)-(9x+18)=0 equation: 


Simplifying
(X3 + -2x2) + -1(9x + 18) = 0

Remove parenthesis around (X3 + -2x2)
X3 + -2x2 + -1(9x + 18) = 0

Reorder the terms:
X3 + -2x2 + -1(18 + 9x) = 0
X3 + -2x2 + (18 * -1 + 9x * -1) = 0
X3 + -2x2 + (-18 + -9x) = 0

Reorder the terms:
-18 + X3 + -9x + -2x2 = 0

Solving
-18 + X3 + -9x + -2x2 = 0

Solving for variable 'X'.

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

Add '18' to each side of the equation.
-18 + X3 + -9x + 18 + -2x2 = 0 + 18

Reorder the terms:
-18 + 18 + X3 + -9x + -2x2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + X3 + -9x + -2x2 = 0 + 18
X3 + -9x + -2x2 = 0 + 18

Combine like terms: 0 + 18 = 18
X3 + -9x + -2x2 = 18

Add '9x' to each side of the equation.
X3 + -9x + 9x + -2x2 = 18 + 9x

Combine like terms: -9x + 9x = 0
X3 + 0 + -2x2 = 18 + 9x
X3 + -2x2 = 18 + 9x

Add '2x2' to each side of the equation.
X3 + -2x2 + 2x2 = 18 + 9x + 2x2

Combine like terms: -2x2 + 2x2 = 0
X3 + 0 = 18 + 9x + 2x2
X3 = 18 + 9x + 2x2

Simplifying
X3 = 18 + 9x + 2x2

Reorder the terms:
-18 + X3 + -9x + -2x2 = 18 + 9x + 2x2 + -18 + -9x + -2x2

Reorder the terms:
-18 + X3 + -9x + -2x2 = 18 + -18 + 9x + -9x + 2x2 + -2x2

Combine like terms: 18 + -18 = 0
-18 + X3 + -9x + -2x2 = 0 + 9x + -9x + 2x2 + -2x2
-18 + X3 + -9x + -2x2 = 9x + -9x + 2x2 + -2x2

Combine like terms: 9x + -9x = 0
-18 + X3 + -9x + -2x2 = 0 + 2x2 + -2x2
-18 + X3 + -9x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-18 + X3 + -9x + -2x2 = 0

The solution to this equation could not be determined.

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