2n^2-n-55=0

Solution for 2n^2-n-55=0 equation:

Simplifying
2n2 + -1n + -55 = 0

Reorder the terms:
-55 + -1n + 2n2 = 0

Solving
-55 + -1n + 2n2 = 0

Solving for variable 'n'.

Factor a trinomial.
(-5 + -1n)(11 + -2n) = 0

Subproblem 1
Set the factor '(-5 + -1n)' equal to zero and attempt to solve:

Simplifying
-5 + -1n = 0

Solving
-5 + -1n = 0

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

Add '5' to each side of the equation.
-5 + 5 + -1n = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -1n = 0 + 5
-1n = 0 + 5

Combine like terms: 0 + 5 = 5
-1n = 5

Divide each side by '-1'.
n = -5

Simplifying
n = -5
Subproblem 2
Set the factor '(11 + -2n)' equal to zero and attempt to solve:

Simplifying
11 + -2n = 0

Solving
11 + -2n = 0

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

Add '-11' to each side of the equation.
11 + -11 + -2n = 0 + -11

Combine like terms: 11 + -11 = 0
0 + -2n = 0 + -11
-2n = 0 + -11

Combine like terms: 0 + -11 = -11
-2n = -11

Divide each side by '-2'.
n = 5.5

Simplifying
n = 5.5
Solution
n = {-5, 5.5}