3m^2+12m+7=0

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Solution for 3m^2+12m+7=0 equation:


Simplifying
3m2 + 12m + 7 = 0

Reorder the terms:
7 + 12m + 3m2 = 0

Solving
7 + 12m + 3m2 = 0

Solving for variable 'm'.

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
2.333333333 + 4m + m2 = 0

Move the constant term to the right:

Add '-2.333333333' to each side of the equation.
2.333333333 + 4m + -2.333333333 + m2 = 0 + -2.333333333

Reorder the terms:
2.333333333 + -2.333333333 + 4m + m2 = 0 + -2.333333333

Combine like terms: 2.333333333 + -2.333333333 = 0.000000000
0.000000000 + 4m + m2 = 0 + -2.333333333
4m + m2 = 0 + -2.333333333

Combine like terms: 0 + -2.333333333 = -2.333333333
4m + m2 = -2.333333333

The m term is 4m.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4m + 4 + m2 = -2.333333333 + 4

Reorder the terms:
4 + 4m + m2 = -2.333333333 + 4

Combine like terms: -2.333333333 + 4 = 1.666666667
4 + 4m + m2 = 1.666666667

Factor a perfect square on the left side:
(m + 2)(m + 2) = 1.666666667

Calculate the square root of the right side: 1.290994449

Break this problem into two subproblems by setting 
(m + 2) equal to 1.290994449 and -1.290994449.

Subproblem 1

m + 2 = 1.290994449 Simplifying m + 2 = 1.290994449 Reorder the terms: 2 + m = 1.290994449 Solving 2 + m = 1.290994449 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + m = 1.290994449 + -2 Combine like terms: 2 + -2 = 0 0 + m = 1.290994449 + -2 m = 1.290994449 + -2 Combine like terms: 1.290994449 + -2 = -0.709005551 m = -0.709005551 Simplifying m = -0.709005551

Subproblem 2

m + 2 = -1.290994449 Simplifying m + 2 = -1.290994449 Reorder the terms: 2 + m = -1.290994449 Solving 2 + m = -1.290994449 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + m = -1.290994449 + -2 Combine like terms: 2 + -2 = 0 0 + m = -1.290994449 + -2 m = -1.290994449 + -2 Combine like terms: -1.290994449 + -2 = -3.290994449 m = -3.290994449 Simplifying m = -3.290994449

Solution

The solution to the problem is based on the solutions from the subproblems. m = {-0.709005551, -3.290994449}

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