2(x^2+2)=8x

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Solution for 2(x^2+2)=8x equation: 


Simplifying
2(x2 + 2) = 8x

Reorder the terms:
2(2 + x2) = 8x
(2 * 2 + x2 * 2) = 8x
(4 + 2x2) = 8x

Solving
4 + 2x2 = 8x

Solving for variable 'x'.

Reorder the terms:
4 + -8x + 2x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
4 + -8x + 2x2 = 0

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

Ignore the factor 2.

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

Simplifying
2 + -4x + x2 = 0

Solving
2 + -4x + x2 = 0

Begin completing the square.

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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