3a^3+18a=0

Solution for 3a^3+18a=0 equation:

Simplifying
3a3 + 18a = 0

Reorder the terms:
18a + 3a3 = 0

Solving
18a + 3a3 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '3a'.
3a(6 + a2) = 0

Ignore the factor 3.
Subproblem 1
Set the factor 'a' equal to zero and attempt to solve:

Simplifying
a = 0

Solving
a = 0

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

Simplifying
a = 0
Subproblem 2
Set the factor '(6 + a2)' equal to zero and attempt to solve:

Simplifying
6 + a2 = 0

Solving
6 + a2 = 0

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

Add '-6' to each side of the equation.
6 + -6 + a2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + a2 = 0 + -6
a2 = 0 + -6

Combine like terms: 0 + -6 = -6
a2 = -6

Simplifying
a2 = -6

The solution to this equation could not be determined.

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