n^2+n-338=0

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Solution for n^2+n-338=0 equation:


Simplifying
n2 + n + -338 = 0

Reorder the terms:
-338 + n + n2 = 0

Solving
-338 + n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '338' to each side of the equation.
-338 + n + 338 + n2 = 0 + 338

Reorder the terms:
-338 + 338 + n + n2 = 0 + 338

Combine like terms: -338 + 338 = 0
0 + n + n2 = 0 + 338
n + n2 = 0 + 338

Combine like terms: 0 + 338 = 338
n + n2 = 338

The n term is n.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
n + 0.25 + n2 = 338 + 0.25

Reorder the terms:
0.25 + n + n2 = 338 + 0.25

Combine like terms: 338 + 0.25 = 338.25
0.25 + n + n2 = 338.25

Factor a perfect square on the left side:
(n + 0.5)(n + 0.5) = 338.25

Calculate the square root of the right side: 18.391574158

Break this problem into two subproblems by setting 
(n + 0.5) equal to 18.391574158 and -18.391574158.

Subproblem 1

n + 0.5 = 18.391574158 Simplifying n + 0.5 = 18.391574158 Reorder the terms: 0.5 + n = 18.391574158 Solving 0.5 + n = 18.391574158 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + n = 18.391574158 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + n = 18.391574158 + -0.5 n = 18.391574158 + -0.5 Combine like terms: 18.391574158 + -0.5 = 17.891574158 n = 17.891574158 Simplifying n = 17.891574158

Subproblem 2

n + 0.5 = -18.391574158 Simplifying n + 0.5 = -18.391574158 Reorder the terms: 0.5 + n = -18.391574158 Solving 0.5 + n = -18.391574158 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + n = -18.391574158 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + n = -18.391574158 + -0.5 n = -18.391574158 + -0.5 Combine like terms: -18.391574158 + -0.5 = -18.891574158 n = -18.891574158 Simplifying n = -18.891574158

Solution

The solution to the problem is based on the solutions from the subproblems. n = {17.891574158, -18.891574158}

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