x^2+22x=-13

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Solution for x^2+22x=-13 equation:


Simplifying
x2 + 22x = -13

Reorder the terms:
22x + x2 = -13

Solving
22x + x2 = -13

Solving for variable 'x'.

Reorder the terms:
13 + 22x + x2 = -13 + 13

Combine like terms: -13 + 13 = 0
13 + 22x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-13' to each side of the equation.
13 + 22x + -13 + x2 = 0 + -13

Reorder the terms:
13 + -13 + 22x + x2 = 0 + -13

Combine like terms: 13 + -13 = 0
0 + 22x + x2 = 0 + -13
22x + x2 = 0 + -13

Combine like terms: 0 + -13 = -13
22x + x2 = -13

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 = -13 + 121

Reorder the terms:
121 + 22x + x2 = -13 + 121

Combine like terms: -13 + 121 = 108
121 + 22x + x2 = 108

Factor a perfect square on the left side:
(x + 11)(x + 11) = 108

Calculate the square root of the right side: 10.392304845

Break this problem into two subproblems by setting 
(x + 11) equal to 10.392304845 and -10.392304845.

Subproblem 1

x + 11 = 10.392304845 Simplifying x + 11 = 10.392304845 Reorder the terms: 11 + x = 10.392304845 Solving 11 + x = 10.392304845 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 = 10.392304845 + -11 Combine like terms: 11 + -11 = 0 0 + x = 10.392304845 + -11 x = 10.392304845 + -11 Combine like terms: 10.392304845 + -11 = -0.607695155 x = -0.607695155 Simplifying x = -0.607695155

Subproblem 2

x + 11 = -10.392304845 Simplifying x + 11 = -10.392304845 Reorder the terms: 11 + x = -10.392304845 Solving 11 + x = -10.392304845 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 = -10.392304845 + -11 Combine like terms: 11 + -11 = 0 0 + x = -10.392304845 + -11 x = -10.392304845 + -11 Combine like terms: -10.392304845 + -11 = -21.392304845 x = -21.392304845 Simplifying x = -21.392304845

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.607695155, -21.392304845}

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