2x^2+8x-124=0

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Solution for 2x^2+8x-124=0 equation: 


Simplifying
2x2 + 8x + -124 = 0

Reorder the terms:
-124 + 8x + 2x2 = 0

Solving
-124 + 8x + 2x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-62 + 4x + x2) = 0

Ignore the factor 2.

Subproblem 1
Set the factor '(-62 + 4x + x2)' equal to zero and attempt to solve:

Simplifying
-62 + 4x + x2 = 0

Solving
-62 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '62' to each side of the equation.
-62 + 4x + 62 + x2 = 0 + 62

Reorder the terms:
-62 + 62 + 4x + x2 = 0 + 62

Combine like terms: -62 + 62 = 0
0 + 4x + x2 = 0 + 62
4x + x2 = 0 + 62

Combine like terms: 0 + 62 = 62
4x + x2 = 62

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 = 62 + 4

Reorder the terms:
4 + 4x + x2 = 62 + 4

Combine like terms: 62 + 4 = 66
4 + 4x + x2 = 66

Factor a perfect square on the left side:
(x + 2)(x + 2) = 66

Calculate the square root of the right side: 8.124038405

Break this problem into two subproblems by setting 
(x + 2) equal to 8.124038405 and -8.124038405.


Subproblem 1
x + 2 = 8.124038405

Simplifying
x + 2 = 8.124038405

Reorder the terms:
2 + x = 8.124038405

Solving
2 + x = 8.124038405

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 = 8.124038405 + -2

Combine like terms: 2 + -2 = 0
0 + x = 8.124038405 + -2
x = 8.124038405 + -2

Combine like terms: 8.124038405 + -2 = 6.124038405
x = 6.124038405

Simplifying
x = 6.124038405


Subproblem 2
x + 2 = -8.124038405

Simplifying
x + 2 = -8.124038405

Reorder the terms:
2 + x = -8.124038405

Solving
2 + x = -8.124038405

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 = -8.124038405 + -2

Combine like terms: 2 + -2 = 0
0 + x = -8.124038405 + -2
x = -8.124038405 + -2

Combine like terms: -8.124038405 + -2 = -10.124038405
x = -10.124038405

Simplifying
x = -10.124038405


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {6.124038405, -10.124038405}
Solution
x = {6.124038405, -10.124038405}

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