0=8x^3-36x

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Solution for 0=8x^3-36x equation:


Simplifying
0 = 8x3 + -36x

Reorder the terms:
0 = -36x + 8x3

Solving
0 = -36x + 8x3

Solving for variable 'x'.
Remove the zero:
36x + -8x3 = -36x + 8x3 + 36x + -8x3

Reorder the terms:
36x + -8x3 = -36x + 36x + 8x3 + -8x3

Combine like terms: -36x + 36x = 0
36x + -8x3 = 0 + 8x3 + -8x3
36x + -8x3 = 8x3 + -8x3

Combine like terms: 8x3 + -8x3 = 0
36x + -8x3 = 0

Factor out the Greatest Common Factor (GCF), '4x'.
4x(9 + -2x2) = 0

Ignore the factor 4.

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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