m^2+12m=-8

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Solution for m^2+12m=-8 equation:


Simplifying
m2 + 12m = -8

Reorder the terms:
12m + m2 = -8

Solving
12m + m2 = -8

Solving for variable 'm'.

Reorder the terms:
8 + 12m + m2 = -8 + 8

Combine like terms: -8 + 8 = 0
8 + 12m + m2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + 12m + -8 + m2 = 0 + -8

Reorder the terms:
8 + -8 + 12m + m2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + 12m + m2 = 0 + -8
12m + m2 = 0 + -8

Combine like terms: 0 + -8 = -8
12m + m2 = -8

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

Add '36' to each side of the equation.
12m + 36 + m2 = -8 + 36

Reorder the terms:
36 + 12m + m2 = -8 + 36

Combine like terms: -8 + 36 = 28
36 + 12m + m2 = 28

Factor a perfect square on the left side:
(m + 6)(m + 6) = 28

Calculate the square root of the right side: 5.291502622

Break this problem into two subproblems by setting 
(m + 6) equal to 5.291502622 and -5.291502622.

Subproblem 1

m + 6 = 5.291502622 Simplifying m + 6 = 5.291502622 Reorder the terms: 6 + m = 5.291502622 Solving 6 + m = 5.291502622 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + m = 5.291502622 + -6 Combine like terms: 6 + -6 = 0 0 + m = 5.291502622 + -6 m = 5.291502622 + -6 Combine like terms: 5.291502622 + -6 = -0.708497378 m = -0.708497378 Simplifying m = -0.708497378

Subproblem 2

m + 6 = -5.291502622 Simplifying m + 6 = -5.291502622 Reorder the terms: 6 + m = -5.291502622 Solving 6 + m = -5.291502622 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + m = -5.291502622 + -6 Combine like terms: 6 + -6 = 0 0 + m = -5.291502622 + -6 m = -5.291502622 + -6 Combine like terms: -5.291502622 + -6 = -11.291502622 m = -11.291502622 Simplifying m = -11.291502622

Solution

The solution to the problem is based on the solutions from the subproblems. m = {-0.708497378, -11.291502622}

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