2n^2-2n-18=6

Solution for 2n^2-2n-18=6 equation:

Simplifying
2n2 + -2n + -18 = 6

Reorder the terms:
-18 + -2n + 2n2 = 6

Solving
-18 + -2n + 2n2 = 6

Solving for variable 'n'.

Reorder the terms:
-18 + -6 + -2n + 2n2 = 6 + -6

Combine like terms: -18 + -6 = -24
-24 + -2n + 2n2 = 6 + -6

Combine like terms: 6 + -6 = 0
-24 + -2n + 2n2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-12 + -1n + n2) = 0

Factor a trinomial.
2((-3 + -1n)(4 + -1n)) = 0

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

Simplifying
-3 + -1n = 0

Solving
-3 + -1n = 0

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

Add '3' to each side of the equation.
-3 + 3 + -1n = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -1n = 0 + 3
-1n = 0 + 3

Combine like terms: 0 + 3 = 3
-1n = 3

Divide each side by '-1'.
n = -3

Simplifying
n = -3
Subproblem 2
Set the factor '(4 + -1n)' equal to zero and attempt to solve:

Simplifying
4 + -1n = 0

Solving
4 + -1n = 0

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

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

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

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

Divide each side by '-1'.
n = 4

Simplifying
n = 4
Solution
n = {-3, 4}