4x^2+0.33x-0.33=0

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Solution for 4x^2+0.33x-0.33=0 equation:


Simplifying
4x2 + 0.33x + -0.33 = 0

Reorder the terms:
-0.33 + 0.33x + 4x2 = 0

Solving
-0.33 + 0.33x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-0.0825 + 0.0825x + x2 = 0

Move the constant term to the right:

Add '0.0825' to each side of the equation.
-0.0825 + 0.0825x + 0.0825 + x2 = 0 + 0.0825

Reorder the terms:
-0.0825 + 0.0825 + 0.0825x + x2 = 0 + 0.0825

Combine like terms: -0.0825 + 0.0825 = 0.0000
0.0000 + 0.0825x + x2 = 0 + 0.0825
0.0825x + x2 = 0 + 0.0825

Combine like terms: 0 + 0.0825 = 0.0825
0.0825x + x2 = 0.0825

The x term is 0.0825x.  Take half its coefficient (0.04125).
Square it (0.0017015625) and add it to both sides.

Add '0.0017015625' to each side of the equation.
0.0825x + 0.0017015625 + x2 = 0.0825 + 0.0017015625

Reorder the terms:
0.0017015625 + 0.0825x + x2 = 0.0825 + 0.0017015625

Combine like terms: 0.0825 + 0.0017015625 = 0.0842015625
0.0017015625 + 0.0825x + x2 = 0.0842015625

Factor a perfect square on the left side:
(x + 0.04125)(x + 0.04125) = 0.0842015625

Calculate the square root of the right side: 0.290175055

Break this problem into two subproblems by setting 
(x + 0.04125) equal to 0.290175055 and -0.290175055.

Subproblem 1

x + 0.04125 = 0.290175055 Simplifying x + 0.04125 = 0.290175055 Reorder the terms: 0.04125 + x = 0.290175055 Solving 0.04125 + x = 0.290175055 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.04125' to each side of the equation. 0.04125 + -0.04125 + x = 0.290175055 + -0.04125 Combine like terms: 0.04125 + -0.04125 = 0.00000 0.00000 + x = 0.290175055 + -0.04125 x = 0.290175055 + -0.04125 Combine like terms: 0.290175055 + -0.04125 = 0.248925055 x = 0.248925055 Simplifying x = 0.248925055

Subproblem 2

x + 0.04125 = -0.290175055 Simplifying x + 0.04125 = -0.290175055 Reorder the terms: 0.04125 + x = -0.290175055 Solving 0.04125 + x = -0.290175055 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.04125' to each side of the equation. 0.04125 + -0.04125 + x = -0.290175055 + -0.04125 Combine like terms: 0.04125 + -0.04125 = 0.00000 0.00000 + x = -0.290175055 + -0.04125 x = -0.290175055 + -0.04125 Combine like terms: -0.290175055 + -0.04125 = -0.331425055 x = -0.331425055 Simplifying x = -0.331425055

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.248925055, -0.331425055}

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