n^2+n-4=8

Solution for n^2+n-4=8 equation:

Simplifying
n2 + n + -4 = 8

Reorder the terms:
-4 + n + n2 = 8

Solving
-4 + n + n2 = 8

Solving for variable 'n'.

Reorder the terms:
-4 + -8 + n + n2 = 8 + -8

Combine like terms: -4 + -8 = -12
-12 + n + n2 = 8 + -8

Combine like terms: 8 + -8 = 0
-12 + n + n2 = 0

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

Subproblem 1
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
Subproblem 2
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
Solution
n = {-4, 3}