0.35x^2-x+0.35=0

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Solution for 0.35x^2-x+0.35=0 equation:


Simplifying
0.35x2 + -1x + 0.35 = 0

Reorder the terms:
0.35 + -1x + 0.35x2 = 0

Solving
0.35 + -1x + 0.35x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.35'.
1 + -2.857142857x + x2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -2.857142857x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + -2.857142857x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -2.857142857x + x2 = 0 + -1
-2.857142857x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
-2.857142857x + x2 = -1

The x term is -2.857142857x.  Take half its coefficient (-1.428571429).
Square it (2.040816328) and add it to both sides.

Add '2.040816328' to each side of the equation.
-2.857142857x + 2.040816328 + x2 = -1 + 2.040816328

Reorder the terms:
2.040816328 + -2.857142857x + x2 = -1 + 2.040816328

Combine like terms: -1 + 2.040816328 = 1.040816328
2.040816328 + -2.857142857x + x2 = 1.040816328

Factor a perfect square on the left side:
(x + -1.428571429)(x + -1.428571429) = 1.040816328

Calculate the square root of the right side: 1.020204062

Break this problem into two subproblems by setting 
(x + -1.428571429) equal to 1.020204062 and -1.020204062.

Subproblem 1

x + -1.428571429 = 1.020204062 Simplifying x + -1.428571429 = 1.020204062 Reorder the terms: -1.428571429 + x = 1.020204062 Solving -1.428571429 + x = 1.020204062 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.428571429' to each side of the equation. -1.428571429 + 1.428571429 + x = 1.020204062 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + x = 1.020204062 + 1.428571429 x = 1.020204062 + 1.428571429 Combine like terms: 1.020204062 + 1.428571429 = 2.448775491 x = 2.448775491 Simplifying x = 2.448775491

Subproblem 2

x + -1.428571429 = -1.020204062 Simplifying x + -1.428571429 = -1.020204062 Reorder the terms: -1.428571429 + x = -1.020204062 Solving -1.428571429 + x = -1.020204062 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.428571429' to each side of the equation. -1.428571429 + 1.428571429 + x = -1.020204062 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + x = -1.020204062 + 1.428571429 x = -1.020204062 + 1.428571429 Combine like terms: -1.020204062 + 1.428571429 = 0.408367367 x = 0.408367367 Simplifying x = 0.408367367

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.448775491, 0.408367367}

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