64n^2-50n-1=0

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Solution for 64n^2-50n-1=0 equation:


Simplifying
64n2 + -50n + -1 = 0

Reorder the terms:
-1 + -50n + 64n2 = 0

Solving
-1 + -50n + 64n2 = 0

Solving for variable 'n'.

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

Divide each side by '64'.
-0.015625 + -0.78125n + n2 = 0

Move the constant term to the right:

Add '0.015625' to each side of the equation.
-0.015625 + -0.78125n + 0.015625 + n2 = 0 + 0.015625

Reorder the terms:
-0.015625 + 0.015625 + -0.78125n + n2 = 0 + 0.015625

Combine like terms: -0.015625 + 0.015625 = 0.000000
0.000000 + -0.78125n + n2 = 0 + 0.015625
-0.78125n + n2 = 0 + 0.015625

Combine like terms: 0 + 0.015625 = 0.015625
-0.78125n + n2 = 0.015625

The n term is -0.78125n.  Take half its coefficient (-0.390625).
Square it (0.1525878906) and add it to both sides.

Add '0.1525878906' to each side of the equation.
-0.78125n + 0.1525878906 + n2 = 0.015625 + 0.1525878906

Reorder the terms:
0.1525878906 + -0.78125n + n2 = 0.015625 + 0.1525878906

Combine like terms: 0.015625 + 0.1525878906 = 0.1682128906
0.1525878906 + -0.78125n + n2 = 0.1682128906

Factor a perfect square on the left side:
(n + -0.390625)(n + -0.390625) = 0.1682128906

Calculate the square root of the right side: 0.410137648

Break this problem into two subproblems by setting 
(n + -0.390625) equal to 0.410137648 and -0.410137648.

Subproblem 1

n + -0.390625 = 0.410137648 Simplifying n + -0.390625 = 0.410137648 Reorder the terms: -0.390625 + n = 0.410137648 Solving -0.390625 + n = 0.410137648 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.390625' to each side of the equation. -0.390625 + 0.390625 + n = 0.410137648 + 0.390625 Combine like terms: -0.390625 + 0.390625 = 0.000000 0.000000 + n = 0.410137648 + 0.390625 n = 0.410137648 + 0.390625 Combine like terms: 0.410137648 + 0.390625 = 0.800762648 n = 0.800762648 Simplifying n = 0.800762648

Subproblem 2

n + -0.390625 = -0.410137648 Simplifying n + -0.390625 = -0.410137648 Reorder the terms: -0.390625 + n = -0.410137648 Solving -0.390625 + n = -0.410137648 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.390625' to each side of the equation. -0.390625 + 0.390625 + n = -0.410137648 + 0.390625 Combine like terms: -0.390625 + 0.390625 = 0.000000 0.000000 + n = -0.410137648 + 0.390625 n = -0.410137648 + 0.390625 Combine like terms: -0.410137648 + 0.390625 = -0.019512648 n = -0.019512648 Simplifying n = -0.019512648

Solution

The solution to the problem is based on the solutions from the subproblems. n = {0.800762648, -0.019512648}

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