72x^3+18x=0

Solution for 72x^3+18x=0 equation:

Simplifying
72x3 + 18x = 0

Reorder the terms:
18x + 72x3 = 0

Solving
18x + 72x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '18x'.
18x(1 + 4x2) = 0

Ignore the factor 18.
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 '(1 + 4x2)' equal to zero and attempt to solve:

Simplifying
1 + 4x2 = 0

Solving
1 + 4x2 = 0

Move all terms containing x to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + 4x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 4x2 = 0 + -1
4x2 = 0 + -1

Combine like terms: 0 + -1 = -1
4x2 = -1

Divide each side by '4'.
x2 = -0.25

Simplifying
x2 = -0.25

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.
Solution
x = {0}