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'.

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 = 9.444444448
5.444444448 + -4.666666667x + x2 = 9.444444448

Factor a perfect square on the left side:
(x + -2.333333334)(x + -2.333333334) = 9.444444448

Calculate the square root of the right side: 3.073181486

Break this problem into two subproblems by setting 
(x + -2.333333334) equal to 3.073181486 and -3.073181486.


Subproblem 1
x + -2.333333334 = 3.073181486

Simplifying
x + -2.333333334 = 3.073181486

Reorder the terms:
-2.333333334 + x = 3.073181486

Solving
-2.333333334 + x = 3.073181486

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 = 3.073181486 + 2.333333334

Combine like terms: -2.333333334 + 2.333333334 = 0.000000000
0.000000000 + x = 3.073181486 + 2.333333334
x = 3.073181486 + 2.333333334

Combine like terms: 3.073181486 + 2.333333334 = 5.40651482
x = 5.40651482

Simplifying
x = 5.40651482


Subproblem 2
x + -2.333333334 = -3.073181486

Simplifying
x + -2.333333334 = -3.073181486

Reorder the terms:
-2.333333334 + x = -3.073181486

Solving
-2.333333334 + x = -3.073181486

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 = -3.073181486 + 2.333333334

Combine like terms: -2.333333334 + 2.333333334 = 0.000000000
0.000000000 + x = -3.073181486 + 2.333333334
x = -3.073181486 + 2.333333334

Combine like terms: -3.073181486 + 2.333333334 = -0.739848152
x = -0.739848152

Simplifying
x = -0.739848152


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {5.40651482, -0.739848152}

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