x^2+22x+121=12

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Solution for x^2+22x+121=12 equation:


Simplifying
x2 + 22x + 121 = 12

Reorder the terms:
121 + 22x + x2 = 12

Solving
121 + 22x + x2 = 12

Solving for variable 'x'.

Reorder the terms:
121 + -12 + 22x + x2 = 12 + -12

Combine like terms: 121 + -12 = 109
109 + 22x + x2 = 12 + -12

Combine like terms: 12 + -12 = 0
109 + 22x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-109' to each side of the equation.
109 + 22x + -109 + x2 = 0 + -109

Reorder the terms:
109 + -109 + 22x + x2 = 0 + -109

Combine like terms: 109 + -109 = 0
0 + 22x + x2 = 0 + -109
22x + x2 = 0 + -109

Combine like terms: 0 + -109 = -109
22x + x2 = -109

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 = -109 + 121

Reorder the terms:
121 + 22x + x2 = -109 + 121

Combine like terms: -109 + 121 = 12
121 + 22x + x2 = 12

Factor a perfect square on the left side:
(x + 11)(x + 11) = 12

Calculate the square root of the right side: 3.464101615

Break this problem into two subproblems by setting 
(x + 11) equal to 3.464101615 and -3.464101615.

Subproblem 1

x + 11 = 3.464101615 Simplifying x + 11 = 3.464101615 Reorder the terms: 11 + x = 3.464101615 Solving 11 + x = 3.464101615 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 = 3.464101615 + -11 Combine like terms: 11 + -11 = 0 0 + x = 3.464101615 + -11 x = 3.464101615 + -11 Combine like terms: 3.464101615 + -11 = -7.535898385 x = -7.535898385 Simplifying x = -7.535898385

Subproblem 2

x + 11 = -3.464101615 Simplifying x + 11 = -3.464101615 Reorder the terms: 11 + x = -3.464101615 Solving 11 + x = -3.464101615 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 = -3.464101615 + -11 Combine like terms: 11 + -11 = 0 0 + x = -3.464101615 + -11 x = -3.464101615 + -11 Combine like terms: -3.464101615 + -11 = -14.464101615 x = -14.464101615 Simplifying x = -14.464101615

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-7.535898385, -14.464101615}

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