-3x(x-4)=6

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Solution for -3x(x-4)=6 equation: 


Simplifying
-3x(x + -4) = 6

Reorder the terms:
-3x(-4 + x) = 6
(-4 * -3x + x * -3x) = 6
(12x + -3x2) = 6

Solving
12x + -3x2 = 6

Solving for variable 'x'.

Reorder the terms:
-6 + 12x + -3x2 = 6 + -6

Combine like terms: 6 + -6 = 0
-6 + 12x + -3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-2 + 4x + -1x2) = 0

Ignore the factor 3.

Subproblem 1
Set the factor '(-2 + 4x + -1x2)' equal to zero and attempt to solve:

Simplifying
-2 + 4x + -1x2 = 0

Solving
-2 + 4x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
2 + -4x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -4x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -4x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -4x + x2 = 0 + -2
-4x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-4x + x2 = -2

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

Add '4' to each side of the equation.
-4x + 4 + x2 = -2 + 4

Reorder the terms:
4 + -4x + x2 = -2 + 4

Combine like terms: -2 + 4 = 2
4 + -4x + x2 = 2

Factor a perfect square on the left side:
(x + -2)(x + -2) = 2

Calculate the square root of the right side: 1.414213562

Break this problem into two subproblems by setting 
(x + -2) equal to 1.414213562 and -1.414213562.


Subproblem 1
x + -2 = 1.414213562

Simplifying
x + -2 = 1.414213562

Reorder the terms:
-2 + x = 1.414213562

Solving
-2 + x = 1.414213562

Solving for variable 'x'.

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

Add '2' to each side of the equation.
-2 + 2 + x = 1.414213562 + 2

Combine like terms: -2 + 2 = 0
0 + x = 1.414213562 + 2
x = 1.414213562 + 2

Combine like terms: 1.414213562 + 2 = 3.414213562
x = 3.414213562

Simplifying
x = 3.414213562


Subproblem 2
x + -2 = -1.414213562

Simplifying
x + -2 = -1.414213562

Reorder the terms:
-2 + x = -1.414213562

Solving
-2 + x = -1.414213562

Solving for variable 'x'.

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

Add '2' to each side of the equation.
-2 + 2 + x = -1.414213562 + 2

Combine like terms: -2 + 2 = 0
0 + x = -1.414213562 + 2
x = -1.414213562 + 2

Combine like terms: -1.414213562 + 2 = 0.585786438
x = 0.585786438

Simplifying
x = 0.585786438


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {3.414213562, 0.585786438}
Solution
x = {3.414213562, 0.585786438}

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