2m^2+2m-18=0

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Solution for 2m^2+2m-18=0 equation: 


Simplifying
2m2 + 2m + -18 = 0

Reorder the terms:
-18 + 2m + 2m2 = 0

Solving
-18 + 2m + 2m2 = 0

Solving for variable 'm'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-9 + m + m2) = 0

Ignore the factor 2.

Subproblem 1
Set the factor '(-9 + m + m2)' equal to zero and attempt to solve:

Simplifying
-9 + m + m2 = 0

Solving
-9 + m + m2 = 0

Begin completing the square.

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + m + 9 + m2 = 0 + 9

Reorder the terms:
-9 + 9 + m + m2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + m + m2 = 0 + 9
m + m2 = 0 + 9

Combine like terms: 0 + 9 = 9
m + m2 = 9

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 = 9 + 0.25

Reorder the terms:
0.25 + m + m2 = 9 + 0.25

Combine like terms: 9 + 0.25 = 9.25
0.25 + m + m2 = 9.25

Factor a perfect square on the left side:
(m + 0.5)(m + 0.5) = 9.25

Calculate the square root of the right side: 3.041381265

Break this problem into two subproblems by setting 
(m + 0.5) equal to 3.041381265 and -3.041381265.


Subproblem 1
m + 0.5 = 3.041381265

Simplifying
m + 0.5 = 3.041381265

Reorder the terms:
0.5 + m = 3.041381265

Solving
0.5 + m = 3.041381265

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 = 3.041381265 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + m = 3.041381265 + -0.5
m = 3.041381265 + -0.5

Combine like terms: 3.041381265 + -0.5 = 2.541381265
m = 2.541381265

Simplifying
m = 2.541381265


Subproblem 2
m + 0.5 = -3.041381265

Simplifying
m + 0.5 = -3.041381265

Reorder the terms:
0.5 + m = -3.041381265

Solving
0.5 + m = -3.041381265

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 = -3.041381265 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + m = -3.041381265 + -0.5
m = -3.041381265 + -0.5

Combine like terms: -3.041381265 + -0.5 = -3.541381265
m = -3.541381265

Simplifying
m = -3.541381265


Solution
The solution to the problem is based on the solutions
from the subproblems.
m = {2.541381265, -3.541381265}
Solution
m = {2.541381265, -3.541381265}

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