8x^2-x-506=0

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Solution for 8x^2-x-506=0 equation:


Simplifying
8x2 + -1x + -506 = 0

Reorder the terms:
-506 + -1x + 8x2 = 0

Solving
-506 + -1x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
-63.25 + -0.125x + x2 = 0

Move the constant term to the right:

Add '63.25' to each side of the equation.
-63.25 + -0.125x + 63.25 + x2 = 0 + 63.25

Reorder the terms:
-63.25 + 63.25 + -0.125x + x2 = 0 + 63.25

Combine like terms: -63.25 + 63.25 = 0.00
0.00 + -0.125x + x2 = 0 + 63.25
-0.125x + x2 = 0 + 63.25

Combine like terms: 0 + 63.25 = 63.25
-0.125x + x2 = 63.25

The x term is -0.125x.  Take half its coefficient (-0.0625).
Square it (0.00390625) and add it to both sides.

Add '0.00390625' to each side of the equation.
-0.125x + 0.00390625 + x2 = 63.25 + 0.00390625

Reorder the terms:
0.00390625 + -0.125x + x2 = 63.25 + 0.00390625

Combine like terms: 63.25 + 0.00390625 = 63.25390625
0.00390625 + -0.125x + x2 = 63.25390625

Factor a perfect square on the left side:
(x + -0.0625)(x + -0.0625) = 63.25390625

Calculate the square root of the right side: 7.95323244

Break this problem into two subproblems by setting 
(x + -0.0625) equal to 7.95323244 and -7.95323244.

Subproblem 1

x + -0.0625 = 7.95323244 Simplifying x + -0.0625 = 7.95323244 Reorder the terms: -0.0625 + x = 7.95323244 Solving -0.0625 + x = 7.95323244 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.0625' to each side of the equation. -0.0625 + 0.0625 + x = 7.95323244 + 0.0625 Combine like terms: -0.0625 + 0.0625 = 0.0000 0.0000 + x = 7.95323244 + 0.0625 x = 7.95323244 + 0.0625 Combine like terms: 7.95323244 + 0.0625 = 8.01573244 x = 8.01573244 Simplifying x = 8.01573244

Subproblem 2

x + -0.0625 = -7.95323244 Simplifying x + -0.0625 = -7.95323244 Reorder the terms: -0.0625 + x = -7.95323244 Solving -0.0625 + x = -7.95323244 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.0625' to each side of the equation. -0.0625 + 0.0625 + x = -7.95323244 + 0.0625 Combine like terms: -0.0625 + 0.0625 = 0.0000 0.0000 + x = -7.95323244 + 0.0625 x = -7.95323244 + 0.0625 Combine like terms: -7.95323244 + 0.0625 = -7.89073244 x = -7.89073244 Simplifying x = -7.89073244

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.01573244, -7.89073244}

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