x^2-22x-121=0

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


Simplifying
x2 + -22x + -121 = 0

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

Solving
-121 + -22x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

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 = 26.556349186 x = 26.556349186 Simplifying x = 26.556349186

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 = -4.556349186 x = -4.556349186 Simplifying x = -4.556349186

Solution

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

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