0=18x-4x^3

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Solution for 0=18x-4x^3 equation:


Simplifying
0 = 18x + -4x3

Solving
0 = 18x + -4x3

Solving for variable 'x'.
Remove the zero:
-18x + 4x3 = 18x + -4x3 + -18x + 4x3

Reorder the terms:
-18x + 4x3 = 18x + -18x + -4x3 + 4x3

Combine like terms: 18x + -18x = 0
-18x + 4x3 = 0 + -4x3 + 4x3
-18x + 4x3 = -4x3 + 4x3

Combine like terms: -4x3 + 4x3 = 0
-18x + 4x3 = 0

Factor out the Greatest Common Factor (GCF), '2x'.
2x(-9 + 2x2) = 0

Ignore the factor 2.

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 '(-9 + 2x2)' equal to zero and attempt to solve: Simplifying -9 + 2x2 = 0 Solving -9 + 2x2 = 0 Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 2x2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 2x2 = 0 + 9 2x2 = 0 + 9 Combine like terms: 0 + 9 = 9 2x2 = 9 Divide each side by '2'. x2 = 4.5 Simplifying x2 = 4.5 Take the square root of each side: x = {-2.121320344, 2.121320344}

Solution

x = {0, -2.121320344, 2.121320344}

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