-3n^2-9n-6=0

Solution for -3n^2-9n-6=0 equation:

Simplifying
-3n2 + -9n + -6 = 0

Reorder the terms:
-6 + -9n + -3n2 = 0

Solving
-6 + -9n + -3n2 = 0

Solving for variable 'n'.

Factor out the Greatest Common Factor (GCF), '-3'.
-3(2 + 3n + n2) = 0

Factor a trinomial.
-3((2 + n)(1 + n)) = 0

Ignore the factor -3.
Subproblem 1
Set the factor '(2 + n)' equal to zero and attempt to solve:

Simplifying
2 + n = 0

Solving
2 + n = 0

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

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

Combine like terms: 2 + -2 = 0
0 + n = 0 + -2
n = 0 + -2

Combine like terms: 0 + -2 = -2
n = -2

Simplifying
n = -2
Subproblem 2
Set the factor '(1 + n)' equal to zero and attempt to solve:

Simplifying
1 + n = 0

Solving
1 + n = 0

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

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

Combine like terms: 1 + -1 = 0
0 + n = 0 + -1
n = 0 + -1

Combine like terms: 0 + -1 = -1
n = -1

Simplifying
n = -1
Solution
n = {-2, -1}