x^2-111x-666=0

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Solution for x^2-111x-666=0 equation:


Simplifying
x2 + -111x + -666 = 0

Reorder the terms:
-666 + -111x + x2 = 0

Solving
-666 + -111x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '666' to each side of the equation.
-666 + -111x + 666 + x2 = 0 + 666

Reorder the terms:
-666 + 666 + -111x + x2 = 0 + 666

Combine like terms: -666 + 666 = 0
0 + -111x + x2 = 0 + 666
-111x + x2 = 0 + 666

Combine like terms: 0 + 666 = 666
-111x + x2 = 666

The x term is -111x.  Take half its coefficient (-55.5).
Square it (3080.25) and add it to both sides.

Add '3080.25' to each side of the equation.
-111x + 3080.25 + x2 = 666 + 3080.25

Reorder the terms:
3080.25 + -111x + x2 = 666 + 3080.25

Combine like terms: 666 + 3080.25 = 3746.25
3080.25 + -111x + x2 = 3746.25

Factor a perfect square on the left side:
(x + -55.5)(x + -55.5) = 3746.25

Calculate the square root of the right side: 61.206617289

Break this problem into two subproblems by setting 
(x + -55.5) equal to 61.206617289 and -61.206617289.

Subproblem 1

x + -55.5 = 61.206617289 Simplifying x + -55.5 = 61.206617289 Reorder the terms: -55.5 + x = 61.206617289 Solving -55.5 + x = 61.206617289 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '55.5' to each side of the equation. -55.5 + 55.5 + x = 61.206617289 + 55.5 Combine like terms: -55.5 + 55.5 = 0.0 0.0 + x = 61.206617289 + 55.5 x = 61.206617289 + 55.5 Combine like terms: 61.206617289 + 55.5 = 116.706617289 x = 116.706617289 Simplifying x = 116.706617289

Subproblem 2

x + -55.5 = -61.206617289 Simplifying x + -55.5 = -61.206617289 Reorder the terms: -55.5 + x = -61.206617289 Solving -55.5 + x = -61.206617289 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '55.5' to each side of the equation. -55.5 + 55.5 + x = -61.206617289 + 55.5 Combine like terms: -55.5 + 55.5 = 0.0 0.0 + x = -61.206617289 + 55.5 x = -61.206617289 + 55.5 Combine like terms: -61.206617289 + 55.5 = -5.706617289 x = -5.706617289 Simplifying x = -5.706617289

Solution

The solution to the problem is based on the solutions from the subproblems. x = {116.706617289, -5.706617289}

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