x^3=8x-2x^2

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


Simplifying
x3 = 8x + -2x2

Solving
x3 = 8x + -2x2

Solving for variable 'x'.

Reorder the terms:
-8x + 2x2 + x3 = 8x + -2x2 + -8x + 2x2

Reorder the terms:
-8x + 2x2 + x3 = 8x + -8x + -2x2 + 2x2

Combine like terms: 8x + -8x = 0
-8x + 2x2 + x3 = 0 + -2x2 + 2x2
-8x + 2x2 + x3 = -2x2 + 2x2

Combine like terms: -2x2 + 2x2 = 0
-8x + 2x2 + x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(-8 + 2x + x2) = 0

Factor a trinomial.
x((-4 + -1x)(2 + -1x)) = 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 + -1x)' equal to zero and attempt to solve: Simplifying -4 + -1x = 0 Solving -4 + -1x = 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 + -1x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1x = 0 + 4 -1x = 0 + 4 Combine like terms: 0 + 4 = 4 -1x = 4 Divide each side by '-1'. x = -4 Simplifying x = -4

Subproblem 3

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Solution

x = {0, -4, 2}

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