x(.8888888x+.222222)=2.6

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Solution for x(.8888888x+.222222)=2.6 equation:


Simplifying
x(0.8888888x + 0.222222) = 2.6

Reorder the terms:
x(0.222222 + 0.8888888x) = 2.6
(0.222222 * x + 0.8888888x * x) = 2.6
(0.222222x + 0.8888888x2) = 2.6

Solving
0.222222x + 0.8888888x2 = 2.6

Solving for variable 'x'.

Reorder the terms:
-2.6 + 0.222222x + 0.8888888x2 = 2.6 + -2.6

Combine like terms: 2.6 + -2.6 = 0.0
-2.6 + 0.222222x + 0.8888888x2 = 0.0

Begin completing the square.  Divide all terms by
0.8888888 the coefficient of the squared term: 

Divide each side by '0.8888888'.
-2.925000293 + 0.249999775x + x2 = 0

Move the constant term to the right:

Add '2.925000293' to each side of the equation.
-2.925000293 + 0.249999775x + 2.925000293 + x2 = 0 + 2.925000293

Reorder the terms:
-2.925000293 + 2.925000293 + 0.249999775x + x2 = 0 + 2.925000293

Combine like terms: -2.925000293 + 2.925000293 = 0.000000000
0.000000000 + 0.249999775x + x2 = 0 + 2.925000293
0.249999775x + x2 = 0 + 2.925000293

Combine like terms: 0 + 2.925000293 = 2.925000293
0.249999775x + x2 = 2.925000293

The x term is 0.249999775x.  Take half its coefficient (0.1249998875).
Square it (0.01562497188) and add it to both sides.

Add '0.01562497188' to each side of the equation.
0.249999775x + 0.01562497188 + x2 = 2.925000293 + 0.01562497188

Reorder the terms:
0.01562497188 + 0.249999775x + x2 = 2.925000293 + 0.01562497188

Combine like terms: 2.925000293 + 0.01562497188 = 2.94062526488
0.01562497188 + 0.249999775x + x2 = 2.94062526488

Factor a perfect square on the left side:
(x + 0.1249998875)(x + 0.1249998875) = 2.94062526488

Calculate the square root of the right side: 1.714825141

Break this problem into two subproblems by setting 
(x + 0.1249998875) equal to 1.714825141 and -1.714825141.

Subproblem 1

x + 0.1249998875 = 1.714825141 Simplifying x + 0.1249998875 = 1.714825141 Reorder the terms: 0.1249998875 + x = 1.714825141 Solving 0.1249998875 + x = 1.714825141 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1249998875' to each side of the equation. 0.1249998875 + -0.1249998875 + x = 1.714825141 + -0.1249998875 Combine like terms: 0.1249998875 + -0.1249998875 = 0.0000000000 0.0000000000 + x = 1.714825141 + -0.1249998875 x = 1.714825141 + -0.1249998875 Combine like terms: 1.714825141 + -0.1249998875 = 1.5898252535 x = 1.5898252535 Simplifying x = 1.5898252535

Subproblem 2

x + 0.1249998875 = -1.714825141 Simplifying x + 0.1249998875 = -1.714825141 Reorder the terms: 0.1249998875 + x = -1.714825141 Solving 0.1249998875 + x = -1.714825141 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1249998875' to each side of the equation. 0.1249998875 + -0.1249998875 + x = -1.714825141 + -0.1249998875 Combine like terms: 0.1249998875 + -0.1249998875 = 0.0000000000 0.0000000000 + x = -1.714825141 + -0.1249998875 x = -1.714825141 + -0.1249998875 Combine like terms: -1.714825141 + -0.1249998875 = -1.8398250285 x = -1.8398250285 Simplifying x = -1.8398250285

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.5898252535, -1.8398250285}

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