3x+4x*8x=9

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Solution for 3x+4x*8x=9 equation:


Simplifying
3x + 4x * 8x = 9

Reorder the terms for easier multiplication:
3x + 4 * 8x * x = 9

Multiply 4 * 8
3x + 32x * x = 9

Multiply x * x
3x + 32x2 = 9

Solving
3x + 32x2 = 9

Solving for variable 'x'.

Reorder the terms:
-9 + 3x + 32x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-9 + 3x + 32x2 = 0

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

Divide each side by '32'.
-0.28125 + 0.09375x + x2 = 0

Move the constant term to the right:

Add '0.28125' to each side of the equation.
-0.28125 + 0.09375x + 0.28125 + x2 = 0 + 0.28125

Reorder the terms:
-0.28125 + 0.28125 + 0.09375x + x2 = 0 + 0.28125

Combine like terms: -0.28125 + 0.28125 = 0.00000
0.00000 + 0.09375x + x2 = 0 + 0.28125
0.09375x + x2 = 0 + 0.28125

Combine like terms: 0 + 0.28125 = 0.28125
0.09375x + x2 = 0.28125

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 = 0.28125 + 0.002197265625

Reorder the terms:
0.002197265625 + 0.09375x + x2 = 0.28125 + 0.002197265625

Combine like terms: 0.28125 + 0.002197265625 = 0.283447265625
0.002197265625 + 0.09375x + x2 = 0.283447265625

Factor a perfect square on the left side:
(x + 0.046875)(x + 0.046875) = 0.283447265625

Calculate the square root of the right side: 0.532397657

Break this problem into two subproblems by setting 
(x + 0.046875) equal to 0.532397657 and -0.532397657.

Subproblem 1

x + 0.046875 = 0.532397657 Simplifying x + 0.046875 = 0.532397657 Reorder the terms: 0.046875 + x = 0.532397657 Solving 0.046875 + x = 0.532397657 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 = 0.532397657 + -0.046875 Combine like terms: 0.046875 + -0.046875 = 0.000000 0.000000 + x = 0.532397657 + -0.046875 x = 0.532397657 + -0.046875 Combine like terms: 0.532397657 + -0.046875 = 0.485522657 x = 0.485522657 Simplifying x = 0.485522657

Subproblem 2

x + 0.046875 = -0.532397657 Simplifying x + 0.046875 = -0.532397657 Reorder the terms: 0.046875 + x = -0.532397657 Solving 0.046875 + x = -0.532397657 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 = -0.532397657 + -0.046875 Combine like terms: 0.046875 + -0.046875 = 0.000000 0.000000 + x = -0.532397657 + -0.046875 x = -0.532397657 + -0.046875 Combine like terms: -0.532397657 + -0.046875 = -0.579272657 x = -0.579272657 Simplifying x = -0.579272657

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.485522657, -0.579272657}

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