x^2+12x=-14

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Solution for x^2+12x=-14 equation:


Simplifying
x2 + 12x = -14

Reorder the terms:
12x + x2 = -14

Solving
12x + x2 = -14

Solving for variable 'x'.

Reorder the terms:
14 + 12x + x2 = -14 + 14

Combine like terms: -14 + 14 = 0
14 + 12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-14' to each side of the equation.
14 + 12x + -14 + x2 = 0 + -14

Reorder the terms:
14 + -14 + 12x + x2 = 0 + -14

Combine like terms: 14 + -14 = 0
0 + 12x + x2 = 0 + -14
12x + x2 = 0 + -14

Combine like terms: 0 + -14 = -14
12x + x2 = -14

The x term is 12x.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12x + 36 + x2 = -14 + 36

Reorder the terms:
36 + 12x + x2 = -14 + 36

Combine like terms: -14 + 36 = 22
36 + 12x + x2 = 22

Factor a perfect square on the left side:
(x + 6)(x + 6) = 22

Calculate the square root of the right side: 4.69041576

Break this problem into two subproblems by setting 
(x + 6) equal to 4.69041576 and -4.69041576.

Subproblem 1

x + 6 = 4.69041576 Simplifying x + 6 = 4.69041576 Reorder the terms: 6 + x = 4.69041576 Solving 6 + x = 4.69041576 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 4.69041576 + -6 Combine like terms: 6 + -6 = 0 0 + x = 4.69041576 + -6 x = 4.69041576 + -6 Combine like terms: 4.69041576 + -6 = -1.30958424 x = -1.30958424 Simplifying x = -1.30958424

Subproblem 2

x + 6 = -4.69041576 Simplifying x + 6 = -4.69041576 Reorder the terms: 6 + x = -4.69041576 Solving 6 + x = -4.69041576 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = -4.69041576 + -6 Combine like terms: 6 + -6 = 0 0 + x = -4.69041576 + -6 x = -4.69041576 + -6 Combine like terms: -4.69041576 + -6 = -10.69041576 x = -10.69041576 Simplifying x = -10.69041576

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.30958424, -10.69041576}

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