2m^2+2m-8=0

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

Simplifying
2m2 + 2m + -8 = 0

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

Solving
-8 + 2m + 2m2 = 0

Solving for variable 'm'.

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

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

Simplifying
-4 + m + m2 = 0

Solving
-4 + m + m2 = 0

Begin completing the square.

Move the constant term to the right:

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

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

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

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

The m term is m.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
m + 0.25 + m2 = 4 + 0.25

Reorder the terms:
0.25 + m + m2 = 4 + 0.25

Combine like terms: 4 + 0.25 = 4.25
0.25 + m + m2 = 4.25

Factor a perfect square on the left side:
(m + 0.5)(m + 0.5) = 4.25

Calculate the square root of the right side: 2.061552813

Break this problem into two subproblems by setting 
(m + 0.5) equal to 2.061552813 and -2.061552813.

Subproblem 1
m + 0.5 = 2.061552813

Simplifying
m + 0.5 = 2.061552813

Reorder the terms:
0.5 + m = 2.061552813

Solving
0.5 + m = 2.061552813

Solving for variable 'm'.

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

Add '-0.5' to each side of the equation.
0.5 + -0.5 + m = 2.061552813 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + m = 2.061552813 + -0.5
m = 2.061552813 + -0.5

Combine like terms: 2.061552813 + -0.5 = 1.561552813
m = 1.561552813

Simplifying
m = 1.561552813

Subproblem 2
m + 0.5 = -2.061552813

Simplifying
m + 0.5 = -2.061552813

Reorder the terms:
0.5 + m = -2.061552813

Solving
0.5 + m = -2.061552813

Solving for variable 'm'.

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

Add '-0.5' to each side of the equation.
0.5 + -0.5 + m = -2.061552813 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + m = -2.061552813 + -0.5
m = -2.061552813 + -0.5

Combine like terms: -2.061552813 + -0.5 = -2.561552813
m = -2.561552813

Simplifying
m = -2.561552813

Solution
The solution to the problem is based on the solutions
from the subproblems.
m = {1.561552813, -2.561552813}
Solution
m = {1.561552813, -2.561552813}