6a^3+15a=

Solution for 6a^3+15a= equation:

Simplifying
6a3 + 15a = 0

Reorder the terms:
15a + 6a3 = 0

Solving
15a + 6a3 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '3a'.
3a(5 + 2a2) = 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 '(5 + 2a2)' equal to zero and attempt to solve:

Simplifying
5 + 2a2 = 0

Solving
5 + 2a2 = 0

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

Add '-5' to each side of the equation.
5 + -5 + 2a2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 2a2 = 0 + -5
2a2 = 0 + -5

Combine like terms: 0 + -5 = -5
2a2 = -5

Divide each side by '2'.
a2 = -2.5

Simplifying
a2 = -2.5

The solution to this equation could not be determined.

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