-3x^2-8x-2=0

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Solution for -3x^2-8x-2=0 equation: 


Simplifying
-3x2 + -8x + -2 = 0

Reorder the terms:
-2 + -8x + -3x2 = 0

Solving
-2 + -8x + -3x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '-1'.
-1(2 + 8x + 3x2) = 0

Ignore the factor -1.

Subproblem 1
Set the factor '(2 + 8x + 3x2)' equal to zero and attempt to solve:

Simplifying
2 + 8x + 3x2 = 0

Solving
2 + 8x + 3x2 = 0

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

Divide each side by '3'.
0.6666666667 + 2.666666667x + x2 = 0

Move the constant term to the right:

Add '-0.6666666667' to each side of the equation.
0.6666666667 + 2.666666667x + -0.6666666667 + x2 = 0 + -0.6666666667

Reorder the terms:
0.6666666667 + -0.6666666667 + 2.666666667x + x2 = 0 + -0.6666666667

Combine like terms: 0.6666666667 + -0.6666666667 = 0.0000000000
0.0000000000 + 2.666666667x + x2 = 0 + -0.6666666667
2.666666667x + x2 = 0 + -0.6666666667

Combine like terms: 0 + -0.6666666667 = -0.6666666667
2.666666667x + x2 = -0.6666666667

The x term is 2.666666667x.  Take half its coefficient (1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
2.666666667x + 1.777777780 + x2 = -0.6666666667 + 1.777777780

Reorder the terms:
1.777777780 + 2.666666667x + x2 = -0.6666666667 + 1.777777780

Combine like terms: -0.6666666667 + 1.777777780 = 1.1111111133
1.777777780 + 2.666666667x + x2 = 1.1111111133

Factor a perfect square on the left side:
(x + 1.333333334)(x + 1.333333334) = 1.1111111133

Calculate the square root of the right side: 1.054092554

Break this problem into two subproblems by setting 
(x + 1.333333334) equal to 1.054092554 and -1.054092554.


Subproblem 1
x + 1.333333334 = 1.054092554

Simplifying
x + 1.333333334 = 1.054092554

Reorder the terms:
1.333333334 + x = 1.054092554

Solving
1.333333334 + x = 1.054092554

Solving for variable 'x'.

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

Add '-1.333333334' to each side of the equation.
1.333333334 + -1.333333334 + x = 1.054092554 + -1.333333334

Combine like terms: 1.333333334 + -1.333333334 = 0.000000000
0.000000000 + x = 1.054092554 + -1.333333334
x = 1.054092554 + -1.333333334

Combine like terms: 1.054092554 + -1.333333334 = -0.27924078
x = -0.27924078

Simplifying
x = -0.27924078


Subproblem 2
x + 1.333333334 = -1.054092554

Simplifying
x + 1.333333334 = -1.054092554

Reorder the terms:
1.333333334 + x = -1.054092554

Solving
1.333333334 + x = -1.054092554

Solving for variable 'x'.

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

Add '-1.333333334' to each side of the equation.
1.333333334 + -1.333333334 + x = -1.054092554 + -1.333333334

Combine like terms: 1.333333334 + -1.333333334 = 0.000000000
0.000000000 + x = -1.054092554 + -1.333333334
x = -1.054092554 + -1.333333334

Combine like terms: -1.054092554 + -1.333333334 = -2.387425888
x = -2.387425888

Simplifying
x = -2.387425888


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {-0.27924078, -2.387425888}
Solution
x = {-0.27924078, -2.387425888}

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