x^2+1.80x-0.133=0

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Solution for x^2+1.80x-0.133=0 equation:


Simplifying
x2 + 1.80x + -0.133 = 0

Reorder the terms:
-0.133 + 1.80x + x2 = 0

Solving
-0.133 + 1.80x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.133' to each side of the equation.
-0.133 + 1.80x + 0.133 + x2 = 0 + 0.133

Reorder the terms:
-0.133 + 0.133 + 1.80x + x2 = 0 + 0.133

Combine like terms: -0.133 + 0.133 = 0.000
0.000 + 1.80x + x2 = 0 + 0.133
1.80x + x2 = 0 + 0.133

Combine like terms: 0 + 0.133 = 0.133
1.80x + x2 = 0.133

The x term is 1.80x.  Take half its coefficient (0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
1.80x + 0.81 + x2 = 0.133 + 0.81

Reorder the terms:
0.81 + 1.80x + x2 = 0.133 + 0.81

Combine like terms: 0.133 + 0.81 = 0.943
0.81 + 1.80x + x2 = 0.943

Factor a perfect square on the left side:
(x + 0.9)(x + 0.9) = 0.943

Calculate the square root of the right side: 0.971081871

Break this problem into two subproblems by setting 
(x + 0.9) equal to 0.971081871 and -0.971081871.

Subproblem 1

x + 0.9 = 0.971081871 Simplifying x + 0.9 = 0.971081871 Reorder the terms: 0.9 + x = 0.971081871 Solving 0.9 + x = 0.971081871 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = 0.971081871 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 0.971081871 + -0.9 x = 0.971081871 + -0.9 Combine like terms: 0.971081871 + -0.9 = 0.071081871 x = 0.071081871 Simplifying x = 0.071081871

Subproblem 2

x + 0.9 = -0.971081871 Simplifying x + 0.9 = -0.971081871 Reorder the terms: 0.9 + x = -0.971081871 Solving 0.9 + x = -0.971081871 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = -0.971081871 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -0.971081871 + -0.9 x = -0.971081871 + -0.9 Combine like terms: -0.971081871 + -0.9 = -1.871081871 x = -1.871081871 Simplifying x = -1.871081871

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.071081871, -1.871081871}

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