n+n+n+n+n+n+n=n^2-4

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


Simplifying
n + n + n + n + n + n + n = n2 + -4

Combine like terms: n + n = 2n
2n + n + n + n + n + n = n2 + -4

Combine like terms: 2n + n = 3n
3n + n + n + n + n = n2 + -4

Combine like terms: 3n + n = 4n
4n + n + n + n = n2 + -4

Combine like terms: 4n + n = 5n
5n + n + n = n2 + -4

Combine like terms: 5n + n = 6n
6n + n = n2 + -4

Combine like terms: 6n + n = 7n
7n = n2 + -4

Reorder the terms:
7n = -4 + n2

Solving
7n = -4 + n2

Solving for variable 'n'.

Reorder the terms:
4 + 7n + -1n2 = -4 + n2 + 4 + -1n2

Reorder the terms:
4 + 7n + -1n2 = -4 + 4 + n2 + -1n2

Combine like terms: -4 + 4 = 0
4 + 7n + -1n2 = 0 + n2 + -1n2
4 + 7n + -1n2 = n2 + -1n2

Combine like terms: n2 + -1n2 = 0
4 + 7n + -1n2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-4 + -7n + n2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -7n + 4 + n2 = 0 + 4

Reorder the terms:
-4 + 4 + -7n + n2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -7n + n2 = 0 + 4
-7n + n2 = 0 + 4

Combine like terms: 0 + 4 = 4
-7n + n2 = 4

The n term is -7n.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7n + 12.25 + n2 = 4 + 12.25

Reorder the terms:
12.25 + -7n + n2 = 4 + 12.25

Combine like terms: 4 + 12.25 = 16.25
12.25 + -7n + n2 = 16.25

Factor a perfect square on the left side:
(n + -3.5)(n + -3.5) = 16.25

Calculate the square root of the right side: 4.031128874

Break this problem into two subproblems by setting 
(n + -3.5) equal to 4.031128874 and -4.031128874.

Subproblem 1

n + -3.5 = 4.031128874 Simplifying n + -3.5 = 4.031128874 Reorder the terms: -3.5 + n = 4.031128874 Solving -3.5 + n = 4.031128874 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + n = 4.031128874 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + n = 4.031128874 + 3.5 n = 4.031128874 + 3.5 Combine like terms: 4.031128874 + 3.5 = 7.531128874 n = 7.531128874 Simplifying n = 7.531128874

Subproblem 2

n + -3.5 = -4.031128874 Simplifying n + -3.5 = -4.031128874 Reorder the terms: -3.5 + n = -4.031128874 Solving -3.5 + n = -4.031128874 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + n = -4.031128874 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + n = -4.031128874 + 3.5 n = -4.031128874 + 3.5 Combine like terms: -4.031128874 + 3.5 = -0.531128874 n = -0.531128874 Simplifying n = -0.531128874

Solution

The solution to the problem is based on the solutions from the subproblems. n = {7.531128874, -0.531128874}

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