x^2-0.261x-0.3689=0

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Solution for x^2-0.261x-0.3689=0 equation:


Simplifying
x2 + -0.261x + -0.3689 = 0

Reorder the terms:
-0.3689 + -0.261x + x2 = 0

Solving
-0.3689 + -0.261x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.3689' to each side of the equation.
-0.3689 + -0.261x + 0.3689 + x2 = 0 + 0.3689

Reorder the terms:
-0.3689 + 0.3689 + -0.261x + x2 = 0 + 0.3689

Combine like terms: -0.3689 + 0.3689 = 0.0000
0.0000 + -0.261x + x2 = 0 + 0.3689
-0.261x + x2 = 0 + 0.3689

Combine like terms: 0 + 0.3689 = 0.3689
-0.261x + x2 = 0.3689

The x term is -0.261x.  Take half its coefficient (-0.1305).
Square it (0.01703025) and add it to both sides.

Add '0.01703025' to each side of the equation.
-0.261x + 0.01703025 + x2 = 0.3689 + 0.01703025

Reorder the terms:
0.01703025 + -0.261x + x2 = 0.3689 + 0.01703025

Combine like terms: 0.3689 + 0.01703025 = 0.38593025
0.01703025 + -0.261x + x2 = 0.38593025

Factor a perfect square on the left side:
(x + -0.1305)(x + -0.1305) = 0.38593025

Calculate the square root of the right side: 0.621232847

Break this problem into two subproblems by setting 
(x + -0.1305) equal to 0.621232847 and -0.621232847.

Subproblem 1

x + -0.1305 = 0.621232847 Simplifying x + -0.1305 = 0.621232847 Reorder the terms: -0.1305 + x = 0.621232847 Solving -0.1305 + x = 0.621232847 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1305' to each side of the equation. -0.1305 + 0.1305 + x = 0.621232847 + 0.1305 Combine like terms: -0.1305 + 0.1305 = 0.0000 0.0000 + x = 0.621232847 + 0.1305 x = 0.621232847 + 0.1305 Combine like terms: 0.621232847 + 0.1305 = 0.751732847 x = 0.751732847 Simplifying x = 0.751732847

Subproblem 2

x + -0.1305 = -0.621232847 Simplifying x + -0.1305 = -0.621232847 Reorder the terms: -0.1305 + x = -0.621232847 Solving -0.1305 + x = -0.621232847 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1305' to each side of the equation. -0.1305 + 0.1305 + x = -0.621232847 + 0.1305 Combine like terms: -0.1305 + 0.1305 = 0.0000 0.0000 + x = -0.621232847 + 0.1305 x = -0.621232847 + 0.1305 Combine like terms: -0.621232847 + 0.1305 = -0.490732847 x = -0.490732847 Simplifying x = -0.490732847

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.751732847, -0.490732847}

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