-3x^2-14x-12=0

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Solution for -3x^2-14x-12=0 equation: 


Simplifying
-3x2 + -14x + -12 = 0

Reorder the terms:
-12 + -14x + -3x2 = 0

Solving
-12 + -14x + -3x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '-1'.
-1(12 + 14x + 3x2) = 0

Ignore the factor -1.

Subproblem 1
Set the factor '(12 + 14x + 3x2)' equal to zero and attempt to solve:

Simplifying
12 + 14x + 3x2 = 0

Solving
12 + 14x + 3x2 = 0

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

Divide each side by '3'.
4 + 4.666666667x + x2 = 0

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + 4.666666667x + -4 + x2 = 0 + -4

Reorder the terms:
4 + -4 + 4.666666667x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 4.666666667x + x2 = 0 + -4
4.666666667x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4
4.666666667x + x2 = -4

The x term is 4.666666667x.  Take half its coefficient (2.333333334).
Square it (5.444444448) and add it to both sides.

Add '5.444444448' to each side of the equation.
4.666666667x + 5.444444448 + x2 = -4 + 5.444444448

Reorder the terms:
5.444444448 + 4.666666667x + x2 = -4 + 5.444444448

Combine like terms: -4 + 5.444444448 = 1.444444448
5.444444448 + 4.666666667x + x2 = 1.444444448

Factor a perfect square on the left side:
(x + 2.333333334)(x + 2.333333334) = 1.444444448

Calculate the square root of the right side: 1.201850427

Break this problem into two subproblems by setting 
(x + 2.333333334) equal to 1.201850427 and -1.201850427.


Subproblem 1
x + 2.333333334 = 1.201850427

Simplifying
x + 2.333333334 = 1.201850427

Reorder the terms:
2.333333334 + x = 1.201850427

Solving
2.333333334 + x = 1.201850427

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2.333333334' to each side of the equation.
2.333333334 + -2.333333334 + x = 1.201850427 + -2.333333334

Combine like terms: 2.333333334 + -2.333333334 = 0.000000000
0.000000000 + x = 1.201850427 + -2.333333334
x = 1.201850427 + -2.333333334

Combine like terms: 1.201850427 + -2.333333334 = -1.131482907
x = -1.131482907

Simplifying
x = -1.131482907


Subproblem 2
x + 2.333333334 = -1.201850427

Simplifying
x + 2.333333334 = -1.201850427

Reorder the terms:
2.333333334 + x = -1.201850427

Solving
2.333333334 + x = -1.201850427

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2.333333334' to each side of the equation.
2.333333334 + -2.333333334 + x = -1.201850427 + -2.333333334

Combine like terms: 2.333333334 + -2.333333334 = 0.000000000
0.000000000 + x = -1.201850427 + -2.333333334
x = -1.201850427 + -2.333333334

Combine like terms: -1.201850427 + -2.333333334 = -3.535183761
x = -3.535183761

Simplifying
x = -3.535183761


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {-1.131482907, -3.535183761}
Solution
x = {-1.131482907, -3.535183761}

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