8x(8x)+6x=9

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Solution for 8x(8x)+6x=9 equation:


Simplifying
8x(8x) + 6x = 9

Remove parenthesis around (8x)
8x * 8x + 6x = 9

Reorder the terms for easier multiplication:
8 * 8x * x + 6x = 9

Multiply 8 * 8
64x * x + 6x = 9

Multiply x * x
64x2 + 6x = 9

Reorder the terms:
6x + 64x2 = 9

Solving
6x + 64x2 = 9

Solving for variable 'x'.

Reorder the terms:
-9 + 6x + 64x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-9 + 6x + 64x2 = 0

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

Divide each side by '64'.
-0.140625 + 0.09375x + x2 = 0

Move the constant term to the right:

Add '0.140625' to each side of the equation.
-0.140625 + 0.09375x + 0.140625 + x2 = 0 + 0.140625

Reorder the terms:
-0.140625 + 0.140625 + 0.09375x + x2 = 0 + 0.140625

Combine like terms: -0.140625 + 0.140625 = 0.000000
0.000000 + 0.09375x + x2 = 0 + 0.140625
0.09375x + x2 = 0 + 0.140625

Combine like terms: 0 + 0.140625 = 0.140625
0.09375x + x2 = 0.140625

The x term is 0.09375x.  Take half its coefficient (0.046875).
Square it (0.002197265625) and add it to both sides.

Add '0.002197265625' to each side of the equation.
0.09375x + 0.002197265625 + x2 = 0.140625 + 0.002197265625

Reorder the terms:
0.002197265625 + 0.09375x + x2 = 0.140625 + 0.002197265625

Combine like terms: 0.140625 + 0.002197265625 = 0.142822265625
0.002197265625 + 0.09375x + x2 = 0.142822265625

Factor a perfect square on the left side:
(x + 0.046875)(x + 0.046875) = 0.142822265625

Calculate the square root of the right side: 0.377918332

Break this problem into two subproblems by setting 
(x + 0.046875) equal to 0.377918332 and -0.377918332.

Subproblem 1

x + 0.046875 = 0.377918332 Simplifying x + 0.046875 = 0.377918332 Reorder the terms: 0.046875 + x = 0.377918332 Solving 0.046875 + x = 0.377918332 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.046875' to each side of the equation. 0.046875 + -0.046875 + x = 0.377918332 + -0.046875 Combine like terms: 0.046875 + -0.046875 = 0.000000 0.000000 + x = 0.377918332 + -0.046875 x = 0.377918332 + -0.046875 Combine like terms: 0.377918332 + -0.046875 = 0.331043332 x = 0.331043332 Simplifying x = 0.331043332

Subproblem 2

x + 0.046875 = -0.377918332 Simplifying x + 0.046875 = -0.377918332 Reorder the terms: 0.046875 + x = -0.377918332 Solving 0.046875 + x = -0.377918332 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.046875' to each side of the equation. 0.046875 + -0.046875 + x = -0.377918332 + -0.046875 Combine like terms: 0.046875 + -0.046875 = 0.000000 0.000000 + x = -0.377918332 + -0.046875 x = -0.377918332 + -0.046875 Combine like terms: -0.377918332 + -0.046875 = -0.424793332 x = -0.424793332 Simplifying x = -0.424793332

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.331043332, -0.424793332}

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