x^3=-6x^2-9x

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Solution for x^3=-6x^2-9x equation:


Simplifying
x3 = -6x2 + -9x

Reorder the terms:
x3 = -9x + -6x2

Solving
x3 = -9x + -6x2

Solving for variable 'x'.

Reorder the terms:
9x + 6x2 + x3 = -9x + -6x2 + 9x + 6x2

Reorder the terms:
9x + 6x2 + x3 = -9x + 9x + -6x2 + 6x2

Combine like terms: -9x + 9x = 0
9x + 6x2 + x3 = 0 + -6x2 + 6x2
9x + 6x2 + x3 = -6x2 + 6x2

Combine like terms: -6x2 + 6x2 = 0
9x + 6x2 + x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(9 + 6x + x2) = 0

Factor a trinomial.
x((3 + x)(3 + x)) = 0

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Subproblem 3

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Solution

x = {0, -3, -3}

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