0.2x^2-0.2x+0.659=x

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Solution for 0.2x^2-0.2x+0.659=x equation:


Simplifying
0.2x2 + -0.2x + 0.659 = x

Reorder the terms:
0.659 + -0.2x + 0.2x2 = x

Solving
0.659 + -0.2x + 0.2x2 = x

Solving for variable 'x'.

Reorder the terms:
0.659 + -0.2x + -1x + 0.2x2 = x + -1x

Combine like terms: -0.2x + -1x = -1.2x
0.659 + -1.2x + 0.2x2 = x + -1x

Combine like terms: x + -1x = 0
0.659 + -1.2x + 0.2x2 = 0

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

Divide each side by '0.2'.
3.295 + -6x + x2 = 0

Move the constant term to the right:

Add '-3.295' to each side of the equation.
3.295 + -6x + -3.295 + x2 = 0 + -3.295

Reorder the terms:
3.295 + -3.295 + -6x + x2 = 0 + -3.295

Combine like terms: 3.295 + -3.295 = 0.000
0.000 + -6x + x2 = 0 + -3.295
-6x + x2 = 0 + -3.295

Combine like terms: 0 + -3.295 = -3.295
-6x + x2 = -3.295

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = -3.295 + 9

Reorder the terms:
9 + -6x + x2 = -3.295 + 9

Combine like terms: -3.295 + 9 = 5.705
9 + -6x + x2 = 5.705

Factor a perfect square on the left side:
(x + -3)(x + -3) = 5.705

Calculate the square root of the right side: 2.388514182

Break this problem into two subproblems by setting 
(x + -3) equal to 2.388514182 and -2.388514182.

Subproblem 1

x + -3 = 2.388514182 Simplifying x + -3 = 2.388514182 Reorder the terms: -3 + x = 2.388514182 Solving -3 + x = 2.388514182 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 2.388514182 + 3 Combine like terms: -3 + 3 = 0 0 + x = 2.388514182 + 3 x = 2.388514182 + 3 Combine like terms: 2.388514182 + 3 = 5.388514182 x = 5.388514182 Simplifying x = 5.388514182

Subproblem 2

x + -3 = -2.388514182 Simplifying x + -3 = -2.388514182 Reorder the terms: -3 + x = -2.388514182 Solving -3 + x = -2.388514182 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -2.388514182 + 3 Combine like terms: -3 + 3 = 0 0 + x = -2.388514182 + 3 x = -2.388514182 + 3 Combine like terms: -2.388514182 + 3 = 0.611485818 x = 0.611485818 Simplifying x = 0.611485818

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.388514182, 0.611485818}

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