0=-2x+x^2-122

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Solution for 0=-2x+x^2-122 equation:


Simplifying
0 = -2x + x2 + -122

Reorder the terms:
0 = -122 + -2x + x2

Solving
0 = -122 + -2x + x2

Solving for variable 'x'.

Combine like terms: 0 + 122 = 122
122 + 2x + -1x2 = -122 + -2x + x2 + 122 + 2x + -1x2

Reorder the terms:
122 + 2x + -1x2 = -122 + 122 + -2x + 2x + x2 + -1x2

Combine like terms: -122 + 122 = 0
122 + 2x + -1x2 = 0 + -2x + 2x + x2 + -1x2
122 + 2x + -1x2 = -2x + 2x + x2 + -1x2

Combine like terms: -2x + 2x = 0
122 + 2x + -1x2 = 0 + x2 + -1x2
122 + 2x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
122 + 2x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-122 + -2x + x2 = 0

Move the constant term to the right:

Add '122' to each side of the equation.
-122 + -2x + 122 + x2 = 0 + 122

Reorder the terms:
-122 + 122 + -2x + x2 = 0 + 122

Combine like terms: -122 + 122 = 0
0 + -2x + x2 = 0 + 122
-2x + x2 = 0 + 122

Combine like terms: 0 + 122 = 122
-2x + x2 = 122

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 122 + 1

Reorder the terms:
1 + -2x + x2 = 122 + 1

Combine like terms: 122 + 1 = 123
1 + -2x + x2 = 123

Factor a perfect square on the left side:
(x + -1)(x + -1) = 123

Calculate the square root of the right side: 11.090536506

Break this problem into two subproblems by setting 
(x + -1) equal to 11.090536506 and -11.090536506.

Subproblem 1

x + -1 = 11.090536506 Simplifying x + -1 = 11.090536506 Reorder the terms: -1 + x = 11.090536506 Solving -1 + x = 11.090536506 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 11.090536506 + 1 Combine like terms: -1 + 1 = 0 0 + x = 11.090536506 + 1 x = 11.090536506 + 1 Combine like terms: 11.090536506 + 1 = 12.090536506 x = 12.090536506 Simplifying x = 12.090536506

Subproblem 2

x + -1 = -11.090536506 Simplifying x + -1 = -11.090536506 Reorder the terms: -1 + x = -11.090536506 Solving -1 + x = -11.090536506 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -11.090536506 + 1 Combine like terms: -1 + 1 = 0 0 + x = -11.090536506 + 1 x = -11.090536506 + 1 Combine like terms: -11.090536506 + 1 = -10.090536506 x = -10.090536506 Simplifying x = -10.090536506

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.090536506, -10.090536506}

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