81x^3=4x

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Solution for 81x^3=4x equation:


Simplifying
81x3 = 4x

Solving
81x3 = 4x

Solving for variable 'x'.

Reorder the terms:
-4x + 81x3 = 4x + -4x

Combine like terms: 4x + -4x = 0
-4x + 81x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(-4 + 81x2) = 0

Factor a difference between two squares.
x((2 + 9x)(-2 + 9x)) = 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 '(2 + 9x)' equal to zero and attempt to solve: Simplifying 2 + 9x = 0 Solving 2 + 9x = 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 + 9x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 9x = 0 + -2 9x = 0 + -2 Combine like terms: 0 + -2 = -2 9x = -2 Divide each side by '9'. x = -0.2222222222 Simplifying x = -0.2222222222

Subproblem 3

Set the factor '(-2 + 9x)' equal to zero and attempt to solve: Simplifying -2 + 9x = 0 Solving -2 + 9x = 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 + 9x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + 9x = 0 + 2 9x = 0 + 2 Combine like terms: 0 + 2 = 2 9x = 2 Divide each side by '9'. x = 0.2222222222 Simplifying x = 0.2222222222

Solution

x = {0, -0.2222222222, 0.2222222222}

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