.169-.169x=x^2

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Solution for .169-.169x=x^2 equation:


Simplifying
0.169 + -0.169x = x2

Solving
0.169 + -0.169x = x2

Solving for variable 'x'.

Combine like terms: x2 + -1x2 = 0
0.169 + -0.169x + -1x2 = 0

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

Divide each side by '-1'.
-0.169 + 0.169x + x2 = 0

Move the constant term to the right:

Add '0.169' to each side of the equation.
-0.169 + 0.169x + 0.169 + x2 = 0 + 0.169

Reorder the terms:
-0.169 + 0.169 + 0.169x + x2 = 0 + 0.169

Combine like terms: -0.169 + 0.169 = 0.000
0.000 + 0.169x + x2 = 0 + 0.169
0.169x + x2 = 0 + 0.169

Combine like terms: 0 + 0.169 = 0.169
0.169x + x2 = 0.169

The x term is 0.169x.  Take half its coefficient (0.0845).
Square it (0.00714025) and add it to both sides.

Add '0.00714025' to each side of the equation.
0.169x + 0.00714025 + x2 = 0.169 + 0.00714025

Reorder the terms:
0.00714025 + 0.169x + x2 = 0.169 + 0.00714025

Combine like terms: 0.169 + 0.00714025 = 0.17614025
0.00714025 + 0.169x + x2 = 0.17614025

Factor a perfect square on the left side:
(x + 0.0845)(x + 0.0845) = 0.17614025

Calculate the square root of the right side: 0.41969066

Break this problem into two subproblems by setting 
(x + 0.0845) equal to 0.41969066 and -0.41969066.

Subproblem 1

x + 0.0845 = 0.41969066 Simplifying x + 0.0845 = 0.41969066 Reorder the terms: 0.0845 + x = 0.41969066 Solving 0.0845 + x = 0.41969066 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0845' to each side of the equation. 0.0845 + -0.0845 + x = 0.41969066 + -0.0845 Combine like terms: 0.0845 + -0.0845 = 0.0000 0.0000 + x = 0.41969066 + -0.0845 x = 0.41969066 + -0.0845 Combine like terms: 0.41969066 + -0.0845 = 0.33519066 x = 0.33519066 Simplifying x = 0.33519066

Subproblem 2

x + 0.0845 = -0.41969066 Simplifying x + 0.0845 = -0.41969066 Reorder the terms: 0.0845 + x = -0.41969066 Solving 0.0845 + x = -0.41969066 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0845' to each side of the equation. 0.0845 + -0.0845 + x = -0.41969066 + -0.0845 Combine like terms: 0.0845 + -0.0845 = 0.0000 0.0000 + x = -0.41969066 + -0.0845 x = -0.41969066 + -0.0845 Combine like terms: -0.41969066 + -0.0845 = -0.50419066 x = -0.50419066 Simplifying x = -0.50419066

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.33519066, -0.50419066}

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