x^2-11x-2=0

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


Simplifying
x2 + -11x + -2 = 0

Reorder the terms:
-2 + -11x + x2 = 0

Solving
-2 + -11x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -11x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + -11x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -11x + x2 = 0 + 2
-11x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
-11x + x2 = 2

The x term is -11x.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11x + 30.25 + x2 = 2 + 30.25

Reorder the terms:
30.25 + -11x + x2 = 2 + 30.25

Combine like terms: 2 + 30.25 = 32.25
30.25 + -11x + x2 = 32.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 32.25

Calculate the square root of the right side: 5.678908346

Break this problem into two subproblems by setting 
(x + -5.5) equal to 5.678908346 and -5.678908346.

Subproblem 1

x + -5.5 = 5.678908346 Simplifying x + -5.5 = 5.678908346 Reorder the terms: -5.5 + x = 5.678908346 Solving -5.5 + x = 5.678908346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = 5.678908346 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 5.678908346 + 5.5 x = 5.678908346 + 5.5 Combine like terms: 5.678908346 + 5.5 = 11.178908346 x = 11.178908346 Simplifying x = 11.178908346

Subproblem 2

x + -5.5 = -5.678908346 Simplifying x + -5.5 = -5.678908346 Reorder the terms: -5.5 + x = -5.678908346 Solving -5.5 + x = -5.678908346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = -5.678908346 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -5.678908346 + 5.5 x = -5.678908346 + 5.5 Combine like terms: -5.678908346 + 5.5 = -0.178908346 x = -0.178908346 Simplifying x = -0.178908346

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.178908346, -0.178908346}

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