6(x^2-2x-8)=8

Solution for 6(x^2-2x-8)=8 equation:

Simplifying
6(x2 + -2x + -8) = 8

Reorder the terms:
6(-8 + -2x + x2) = 8
(-8 * 6 + -2x * 6 + x2 * 6) = 8
(-48 + -12x + 6x2) = 8

Solving
-48 + -12x + 6x2 = 8

Solving for variable 'x'.

Reorder the terms:
-48 + -8 + -12x + 6x2 = 8 + -8

Combine like terms: -48 + -8 = -56
-56 + -12x + 6x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-56 + -12x + 6x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-28 + -6x + 3x2) = 0

Ignore the factor 2.
Subproblem 1
Set the factor '(-28 + -6x + 3x2)' equal to zero and attempt to solve:

Simplifying
-28 + -6x + 3x2 = 0

Solving
-28 + -6x + 3x2 = 0

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

Divide each side by '3'.
-9.333333333 + -2x + x2 = 0

Move the constant term to the right:

Add '9.333333333' to each side of the equation.
-9.333333333 + -2x + 9.333333333 + x2 = 0 + 9.333333333

Reorder the terms:
-9.333333333 + 9.333333333 + -2x + x2 = 0 + 9.333333333

Combine like terms: -9.333333333 + 9.333333333 = 0.000000000
0.000000000 + -2x + x2 = 0 + 9.333333333
-2x + x2 = 0 + 9.333333333

Combine like terms: 0 + 9.333333333 = 9.333333333
-2x + x2 = 9.333333333

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 9.333333333 + 1

Reorder the terms:
1 + -2x + x2 = 9.333333333 + 1

Combine like terms: 9.333333333 + 1 = 10.333333333
1 + -2x + x2 = 10.333333333

Factor a perfect square on the left side:
(x + -1)(x + -1) = 10.333333333

Calculate the square root of the right side: 3.214550254

Break this problem into two subproblems by setting 
(x + -1) equal to 3.214550254 and -3.214550254.

Subproblem 1
x + -1 = 3.214550254

Simplifying
x + -1 = 3.214550254

Reorder the terms:
-1 + x = 3.214550254

Solving
-1 + x = 3.214550254

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + x = 3.214550254 + 1

Combine like terms: -1 + 1 = 0
0 + x = 3.214550254 + 1
x = 3.214550254 + 1

Combine like terms: 3.214550254 + 1 = 4.214550254
x = 4.214550254

Simplifying
x = 4.214550254

Subproblem 2
x + -1 = -3.214550254

Simplifying
x + -1 = -3.214550254

Reorder the terms:
-1 + x = -3.214550254

Solving
-1 + x = -3.214550254

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + x = -3.214550254 + 1

Combine like terms: -1 + 1 = 0
0 + x = -3.214550254 + 1
x = -3.214550254 + 1

Combine like terms: -3.214550254 + 1 = -2.214550254
x = -2.214550254

Simplifying
x = -2.214550254

Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {4.214550254, -2.214550254}
Solution
x = {4.214550254, -2.214550254}