x^3=-8x^2-16x

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Solution for x^3=-8x^2-16x equation:


Simplifying
x3 = -8x2 + -16x

Reorder the terms:
x3 = -16x + -8x2

Solving
x3 = -16x + -8x2

Solving for variable 'x'.

Reorder the terms:
16x + 8x2 + x3 = -16x + -8x2 + 16x + 8x2

Reorder the terms:
16x + 8x2 + x3 = -16x + 16x + -8x2 + 8x2

Combine like terms: -16x + 16x = 0
16x + 8x2 + x3 = 0 + -8x2 + 8x2
16x + 8x2 + x3 = -8x2 + 8x2

Combine like terms: -8x2 + 8x2 = 0
16x + 8x2 + x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(16 + 8x + x2) = 0

Factor a trinomial.
x((4 + x)(4 + 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 '(4 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Simplifying x = -4

Subproblem 3

Set the factor '(4 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Simplifying x = -4

Solution

x = {0, -4, -4}

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