2m^2-8m-4=0

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Solution for 2m^2-8m-4=0 equation: 


Simplifying
2m2 + -8m + -4 = 0

Reorder the terms:
-4 + -8m + 2m2 = 0

Solving
-4 + -8m + 2m2 = 0

Solving for variable 'm'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-2 + -4m + m2) = 0

Ignore the factor 2.

Subproblem 1
Set the factor '(-2 + -4m + m2)' equal to zero and attempt to solve:

Simplifying
-2 + -4m + m2 = 0

Solving
-2 + -4m + m2 = 0

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -4m + 2 + m2 = 0 + 2

Reorder the terms:
-2 + 2 + -4m + m2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -4m + m2 = 0 + 2
-4m + m2 = 0 + 2

Combine like terms: 0 + 2 = 2
-4m + m2 = 2

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

Add '4' to each side of the equation.
-4m + 4 + m2 = 2 + 4

Reorder the terms:
4 + -4m + m2 = 2 + 4

Combine like terms: 2 + 4 = 6
4 + -4m + m2 = 6

Factor a perfect square on the left side:
(m + -2)(m + -2) = 6

Calculate the square root of the right side: 2.449489743

Break this problem into two subproblems by setting 
(m + -2) equal to 2.449489743 and -2.449489743.


Subproblem 1
m + -2 = 2.449489743

Simplifying
m + -2 = 2.449489743

Reorder the terms:
-2 + m = 2.449489743

Solving
-2 + m = 2.449489743

Solving for variable 'm'.

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

Add '2' to each side of the equation.
-2 + 2 + m = 2.449489743 + 2

Combine like terms: -2 + 2 = 0
0 + m = 2.449489743 + 2
m = 2.449489743 + 2

Combine like terms: 2.449489743 + 2 = 4.449489743
m = 4.449489743

Simplifying
m = 4.449489743


Subproblem 2
m + -2 = -2.449489743

Simplifying
m + -2 = -2.449489743

Reorder the terms:
-2 + m = -2.449489743

Solving
-2 + m = -2.449489743

Solving for variable 'm'.

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

Add '2' to each side of the equation.
-2 + 2 + m = -2.449489743 + 2

Combine like terms: -2 + 2 = 0
0 + m = -2.449489743 + 2
m = -2.449489743 + 2

Combine like terms: -2.449489743 + 2 = -0.449489743
m = -0.449489743

Simplifying
m = -0.449489743


Solution
The solution to the problem is based on the solutions
from the subproblems.
m = {4.449489743, -0.449489743}
Solution
m = {4.449489743, -0.449489743}

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