0=8n^2-64n-1

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Solution for 0=8n^2-64n-1 equation:


Simplifying
0 = 8n2 + -64n + -1

Reorder the terms:
0 = -1 + -64n + 8n2

Solving
0 = -1 + -64n + 8n2

Solving for variable 'n'.

Combine like terms: 0 + 1 = 1
1 + 64n + -8n2 = -1 + -64n + 8n2 + 1 + 64n + -8n2

Reorder the terms:
1 + 64n + -8n2 = -1 + 1 + -64n + 64n + 8n2 + -8n2

Combine like terms: -1 + 1 = 0
1 + 64n + -8n2 = 0 + -64n + 64n + 8n2 + -8n2
1 + 64n + -8n2 = -64n + 64n + 8n2 + -8n2

Combine like terms: -64n + 64n = 0
1 + 64n + -8n2 = 0 + 8n2 + -8n2
1 + 64n + -8n2 = 8n2 + -8n2

Combine like terms: 8n2 + -8n2 = 0
1 + 64n + -8n2 = 0

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

Divide each side by '-8'.
-0.125 + -8n + n2 = 0

Move the constant term to the right:

Add '0.125' to each side of the equation.
-0.125 + -8n + 0.125 + n2 = 0 + 0.125

Reorder the terms:
-0.125 + 0.125 + -8n + n2 = 0 + 0.125

Combine like terms: -0.125 + 0.125 = 0.000
0.000 + -8n + n2 = 0 + 0.125
-8n + n2 = 0 + 0.125

Combine like terms: 0 + 0.125 = 0.125
-8n + n2 = 0.125

The n term is -8n.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8n + 16 + n2 = 0.125 + 16

Reorder the terms:
16 + -8n + n2 = 0.125 + 16

Combine like terms: 0.125 + 16 = 16.125
16 + -8n + n2 = 16.125

Factor a perfect square on the left side:
(n + -4)(n + -4) = 16.125

Calculate the square root of the right side: 4.015594601

Break this problem into two subproblems by setting 
(n + -4) equal to 4.015594601 and -4.015594601.

Subproblem 1

n + -4 = 4.015594601 Simplifying n + -4 = 4.015594601 Reorder the terms: -4 + n = 4.015594601 Solving -4 + n = 4.015594601 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + n = 4.015594601 + 4 Combine like terms: -4 + 4 = 0 0 + n = 4.015594601 + 4 n = 4.015594601 + 4 Combine like terms: 4.015594601 + 4 = 8.015594601 n = 8.015594601 Simplifying n = 8.015594601

Subproblem 2

n + -4 = -4.015594601 Simplifying n + -4 = -4.015594601 Reorder the terms: -4 + n = -4.015594601 Solving -4 + n = -4.015594601 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + n = -4.015594601 + 4 Combine like terms: -4 + 4 = 0 0 + n = -4.015594601 + 4 n = -4.015594601 + 4 Combine like terms: -4.015594601 + 4 = -0.015594601 n = -0.015594601 Simplifying n = -0.015594601

Solution

The solution to the problem is based on the solutions from the subproblems. n = {8.015594601, -0.015594601}

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