-x^2-22x+121=0

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Solution for -x^2-22x+121=0 equation:


Simplifying
-1x2 + -22x + 121 = 0

Reorder the terms:
121 + -22x + -1x2 = 0

Solving
121 + -22x + -1x2 = 0

Solving for variable 'x'.

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

Divide each side by '-1'.
-121 + 22x + x2 = 0

Move the constant term to the right:

Add '121' to each side of the equation.
-121 + 22x + 121 + x2 = 0 + 121

Reorder the terms:
-121 + 121 + 22x + x2 = 0 + 121

Combine like terms: -121 + 121 = 0
0 + 22x + x2 = 0 + 121
22x + x2 = 0 + 121

Combine like terms: 0 + 121 = 121
22x + x2 = 121

The x term is 22x.  Take half its coefficient (11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
22x + 121 + x2 = 121 + 121

Reorder the terms:
121 + 22x + x2 = 121 + 121

Combine like terms: 121 + 121 = 242
121 + 22x + x2 = 242

Factor a perfect square on the left side:
(x + 11)(x + 11) = 242

Calculate the square root of the right side: 15.556349186

Break this problem into two subproblems by setting 
(x + 11) equal to 15.556349186 and -15.556349186.

Subproblem 1

x + 11 = 15.556349186 Simplifying x + 11 = 15.556349186 Reorder the terms: 11 + x = 15.556349186 Solving 11 + x = 15.556349186 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + x = 15.556349186 + -11 Combine like terms: 11 + -11 = 0 0 + x = 15.556349186 + -11 x = 15.556349186 + -11 Combine like terms: 15.556349186 + -11 = 4.556349186 x = 4.556349186 Simplifying x = 4.556349186

Subproblem 2

x + 11 = -15.556349186 Simplifying x + 11 = -15.556349186 Reorder the terms: 11 + x = -15.556349186 Solving 11 + x = -15.556349186 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + x = -15.556349186 + -11 Combine like terms: 11 + -11 = 0 0 + x = -15.556349186 + -11 x = -15.556349186 + -11 Combine like terms: -15.556349186 + -11 = -26.556349186 x = -26.556349186 Simplifying x = -26.556349186

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.556349186, -26.556349186}

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