8x*8x-18x-5=0

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Solution for 8x*8x-18x-5=0 equation:


Simplifying
8x * 8x + -18x + -5 = 0

Reorder the terms for easier multiplication:
8 * 8x * x + -18x + -5 = 0

Multiply 8 * 8
64x * x + -18x + -5 = 0

Multiply x * x
64x2 + -18x + -5 = 0

Reorder the terms:
-5 + -18x + 64x2 = 0

Solving
-5 + -18x + 64x2 = 0

Solving for variable 'x'.

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

Divide each side by '64'.
-0.078125 + -0.28125x + x2 = 0

Move the constant term to the right:

Add '0.078125' to each side of the equation.
-0.078125 + -0.28125x + 0.078125 + x2 = 0 + 0.078125

Reorder the terms:
-0.078125 + 0.078125 + -0.28125x + x2 = 0 + 0.078125

Combine like terms: -0.078125 + 0.078125 = 0.000000
0.000000 + -0.28125x + x2 = 0 + 0.078125
-0.28125x + x2 = 0 + 0.078125

Combine like terms: 0 + 0.078125 = 0.078125
-0.28125x + x2 = 0.078125

The x term is -0.28125x.  Take half its coefficient (-0.140625).
Square it (0.01977539063) and add it to both sides.

Add '0.01977539063' to each side of the equation.
-0.28125x + 0.01977539063 + x2 = 0.078125 + 0.01977539063

Reorder the terms:
0.01977539063 + -0.28125x + x2 = 0.078125 + 0.01977539063

Combine like terms: 0.078125 + 0.01977539063 = 0.09790039063
0.01977539063 + -0.28125x + x2 = 0.09790039063

Factor a perfect square on the left side:
(x + -0.140625)(x + -0.140625) = 0.09790039063

Calculate the square root of the right side: 0.312890381

Break this problem into two subproblems by setting 
(x + -0.140625) equal to 0.312890381 and -0.312890381.

Subproblem 1

x + -0.140625 = 0.312890381 Simplifying x + -0.140625 = 0.312890381 Reorder the terms: -0.140625 + x = 0.312890381 Solving -0.140625 + x = 0.312890381 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.140625' to each side of the equation. -0.140625 + 0.140625 + x = 0.312890381 + 0.140625 Combine like terms: -0.140625 + 0.140625 = 0.000000 0.000000 + x = 0.312890381 + 0.140625 x = 0.312890381 + 0.140625 Combine like terms: 0.312890381 + 0.140625 = 0.453515381 x = 0.453515381 Simplifying x = 0.453515381

Subproblem 2

x + -0.140625 = -0.312890381 Simplifying x + -0.140625 = -0.312890381 Reorder the terms: -0.140625 + x = -0.312890381 Solving -0.140625 + x = -0.312890381 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.140625' to each side of the equation. -0.140625 + 0.140625 + x = -0.312890381 + 0.140625 Combine like terms: -0.140625 + 0.140625 = 0.000000 0.000000 + x = -0.312890381 + 0.140625 x = -0.312890381 + 0.140625 Combine like terms: -0.312890381 + 0.140625 = -0.172265381 x = -0.172265381 Simplifying x = -0.172265381

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.453515381, -0.172265381}

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