6x^2-11x-256=0

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Solution for 6x^2-11x-256=0 equation:


Simplifying
6x2 + -11x + -256 = 0

Reorder the terms:
-256 + -11x + 6x2 = 0

Solving
-256 + -11x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-42.66666667 + -1.833333333x + x2 = 0

Move the constant term to the right:

Add '42.66666667' to each side of the equation.
-42.66666667 + -1.833333333x + 42.66666667 + x2 = 0 + 42.66666667

Reorder the terms:
-42.66666667 + 42.66666667 + -1.833333333x + x2 = 0 + 42.66666667

Combine like terms: -42.66666667 + 42.66666667 = 0.00000000
0.00000000 + -1.833333333x + x2 = 0 + 42.66666667
-1.833333333x + x2 = 0 + 42.66666667

Combine like terms: 0 + 42.66666667 = 42.66666667
-1.833333333x + x2 = 42.66666667

The x term is -1.833333333x.  Take half its coefficient (-0.9166666665).
Square it (0.8402777775) and add it to both sides.

Add '0.8402777775' to each side of the equation.
-1.833333333x + 0.8402777775 + x2 = 42.66666667 + 0.8402777775

Reorder the terms:
0.8402777775 + -1.833333333x + x2 = 42.66666667 + 0.8402777775

Combine like terms: 42.66666667 + 0.8402777775 = 43.5069444475
0.8402777775 + -1.833333333x + x2 = 43.5069444475

Factor a perfect square on the left side:
(x + -0.9166666665)(x + -0.9166666665) = 43.5069444475

Calculate the square root of the right side: 6.595979415

Break this problem into two subproblems by setting 
(x + -0.9166666665) equal to 6.595979415 and -6.595979415.

Subproblem 1

x + -0.9166666665 = 6.595979415 Simplifying x + -0.9166666665 = 6.595979415 Reorder the terms: -0.9166666665 + x = 6.595979415 Solving -0.9166666665 + x = 6.595979415 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9166666665' to each side of the equation. -0.9166666665 + 0.9166666665 + x = 6.595979415 + 0.9166666665 Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000 0.0000000000 + x = 6.595979415 + 0.9166666665 x = 6.595979415 + 0.9166666665 Combine like terms: 6.595979415 + 0.9166666665 = 7.5126460815 x = 7.5126460815 Simplifying x = 7.5126460815

Subproblem 2

x + -0.9166666665 = -6.595979415 Simplifying x + -0.9166666665 = -6.595979415 Reorder the terms: -0.9166666665 + x = -6.595979415 Solving -0.9166666665 + x = -6.595979415 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9166666665' to each side of the equation. -0.9166666665 + 0.9166666665 + x = -6.595979415 + 0.9166666665 Combine like terms: -0.9166666665 + 0.9166666665 = 0.0000000000 0.0000000000 + x = -6.595979415 + 0.9166666665 x = -6.595979415 + 0.9166666665 Combine like terms: -6.595979415 + 0.9166666665 = -5.6793127485 x = -5.6793127485 Simplifying x = -5.6793127485

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.5126460815, -5.6793127485}

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