x-x^2-.126=0

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Solution for x-x^2-.126=0 equation:


Simplifying
x + -1x2 + -0.126 = 0

Reorder the terms:
-0.126 + x + -1x2 = 0

Solving
-0.126 + x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
0.126 + -1x + x2 = 0

Move the constant term to the right:

Add '-0.126' to each side of the equation.
0.126 + -1x + -0.126 + x2 = 0 + -0.126

Reorder the terms:
0.126 + -0.126 + -1x + x2 = 0 + -0.126

Combine like terms: 0.126 + -0.126 = 0.000
0.000 + -1x + x2 = 0 + -0.126
-1x + x2 = 0 + -0.126

Combine like terms: 0 + -0.126 = -0.126
-1x + x2 = -0.126

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = -0.126 + 0.25

Reorder the terms:
0.25 + -1x + x2 = -0.126 + 0.25

Combine like terms: -0.126 + 0.25 = 0.124
0.25 + -1x + x2 = 0.124

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.124

Calculate the square root of the right side: 0.352136337

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.352136337 and -0.352136337.

Subproblem 1

x + 0.5 = 0.352136337 Simplifying x + 0.5 = 0.352136337 Reorder the terms: 0.5 + x = 0.352136337 Solving 0.5 + x = 0.352136337 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.352136337 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.352136337 + -0.5 x = 0.352136337 + -0.5 Combine like terms: 0.352136337 + -0.5 = -0.147863663 x = -0.147863663 Simplifying x = -0.147863663

Subproblem 2

x + 0.5 = -0.352136337 Simplifying x + 0.5 = -0.352136337 Reorder the terms: 0.5 + x = -0.352136337 Solving 0.5 + x = -0.352136337 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.352136337 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.352136337 + -0.5 x = -0.352136337 + -0.5 Combine like terms: -0.352136337 + -0.5 = -0.852136337 x = -0.852136337 Simplifying x = -0.852136337

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.147863663, -0.852136337}

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