8n(n-2)=5

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Solution for 8n(n-2)=5 equation:


Simplifying
8n(n + -2) = 5

Reorder the terms:
8n(-2 + n) = 5
(-2 * 8n + n * 8n) = 5
(-16n + 8n2) = 5

Solving
-16n + 8n2 = 5

Solving for variable 'n'.

Reorder the terms:
-5 + -16n + 8n2 = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + -16n + 8n2 = 0

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

Divide each side by '8'.
-0.625 + -2n + n2 = 0

Move the constant term to the right:

Add '0.625' to each side of the equation.
-0.625 + -2n + 0.625 + n2 = 0 + 0.625

Reorder the terms:
-0.625 + 0.625 + -2n + n2 = 0 + 0.625

Combine like terms: -0.625 + 0.625 = 0.000
0.000 + -2n + n2 = 0 + 0.625
-2n + n2 = 0 + 0.625

Combine like terms: 0 + 0.625 = 0.625
-2n + n2 = 0.625

The n term is -2n.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2n + 1 + n2 = 0.625 + 1

Reorder the terms:
1 + -2n + n2 = 0.625 + 1

Combine like terms: 0.625 + 1 = 1.625
1 + -2n + n2 = 1.625

Factor a perfect square on the left side:
(n + -1)(n + -1) = 1.625

Calculate the square root of the right side: 1.274754878

Break this problem into two subproblems by setting 
(n + -1) equal to 1.274754878 and -1.274754878.

Subproblem 1

n + -1 = 1.274754878 Simplifying n + -1 = 1.274754878 Reorder the terms: -1 + n = 1.274754878 Solving -1 + n = 1.274754878 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + n = 1.274754878 + 1 Combine like terms: -1 + 1 = 0 0 + n = 1.274754878 + 1 n = 1.274754878 + 1 Combine like terms: 1.274754878 + 1 = 2.274754878 n = 2.274754878 Simplifying n = 2.274754878

Subproblem 2

n + -1 = -1.274754878 Simplifying n + -1 = -1.274754878 Reorder the terms: -1 + n = -1.274754878 Solving -1 + n = -1.274754878 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + n = -1.274754878 + 1 Combine like terms: -1 + 1 = 0 0 + n = -1.274754878 + 1 n = -1.274754878 + 1 Combine like terms: -1.274754878 + 1 = -0.274754878 n = -0.274754878 Simplifying n = -0.274754878

Solution

The solution to the problem is based on the solutions from the subproblems. n = {2.274754878, -0.274754878}

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