x^2=-14x-12

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


Simplifying
x2 = -14x + -12

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

Solving
x2 = -12 + -14x

Solving for variable 'x'.

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

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

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

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

Begin completing the square.

Move the constant term to the right:

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

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

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

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

The x term is 14x.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14x + 49 + x2 = -12 + 49

Reorder the terms:
49 + 14x + x2 = -12 + 49

Combine like terms: -12 + 49 = 37
49 + 14x + x2 = 37

Factor a perfect square on the left side:
(x + 7)(x + 7) = 37

Calculate the square root of the right side: 6.08276253

Break this problem into two subproblems by setting 
(x + 7) equal to 6.08276253 and -6.08276253.

Subproblem 1

x + 7 = 6.08276253 Simplifying x + 7 = 6.08276253 Reorder the terms: 7 + x = 6.08276253 Solving 7 + x = 6.08276253 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 6.08276253 + -7 Combine like terms: 7 + -7 = 0 0 + x = 6.08276253 + -7 x = 6.08276253 + -7 Combine like terms: 6.08276253 + -7 = -0.91723747 x = -0.91723747 Simplifying x = -0.91723747

Subproblem 2

x + 7 = -6.08276253 Simplifying x + 7 = -6.08276253 Reorder the terms: 7 + x = -6.08276253 Solving 7 + x = -6.08276253 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = -6.08276253 + -7 Combine like terms: 7 + -7 = 0 0 + x = -6.08276253 + -7 x = -6.08276253 + -7 Combine like terms: -6.08276253 + -7 = -13.08276253 x = -13.08276253 Simplifying x = -13.08276253

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.91723747, -13.08276253}

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