18x^2+18x=-2

Solution for 18x^2+18x=-2 equation:

Simplifying
18x2 + 18x = -2

Reorder the terms:
18x + 18x2 = -2

Solving
18x + 18x2 = -2

Solving for variable 'x'.

Reorder the terms:
2 + 18x + 18x2 = -2 + 2

Combine like terms: -2 + 2 = 0
2 + 18x + 18x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(1 + 9x + 9x2) = 0

Ignore the factor 2.
Subproblem 1
Set the factor '(1 + 9x + 9x2)' equal to zero and attempt to solve:

Simplifying
1 + 9x + 9x2 = 0

Solving
1 + 9x + 9x2 = 0

Begin completing the square.  Divide all terms by
9 the coefficient of the squared term: 

Divide each side by '9'.
0.1111111111 + x + x2 = 0

Move the constant term to the right:

Add '-0.1111111111' to each side of the equation.
0.1111111111 + x + -0.1111111111 + x2 = 0 + -0.1111111111

Reorder the terms:
0.1111111111 + -0.1111111111 + x + x2 = 0 + -0.1111111111

Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000
0.0000000000 + x + x2 = 0 + -0.1111111111
x + x2 = 0 + -0.1111111111

Combine like terms: 0 + -0.1111111111 = -0.1111111111
x + x2 = -0.1111111111

The x term is x.  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.
 + 0.25 + x2 = -0.1111111111 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = -0.1111111111 + 0.25

Combine like terms: -0.1111111111 + 0.25 = 0.1388888889
1.25 + x2 = 0.1388888889

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.1388888889

Calculate the square root of the right side: 0.372677996

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.372677996 and -0.372677996.

Subproblem 1
x + 0.5 = 0.372677996

Simplifying
x + 0.5 = 0.372677996

Reorder the terms:
0.5 + x = 0.372677996

Solving
0.5 + x = 0.372677996

Solving for variable 'x'.

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

Add '-0.5' to each side of the equation.
0.5 + -0.5 + x = 0.372677996 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + x = 0.372677996 + -0.5
x = 0.372677996 + -0.5

Combine like terms: 0.372677996 + -0.5 = -0.127322004
x = -0.127322004

Simplifying
x = -0.127322004

Subproblem 2
x + 0.5 = -0.372677996

Simplifying
x + 0.5 = -0.372677996

Reorder the terms:
0.5 + x = -0.372677996

Solving
0.5 + x = -0.372677996

Solving for variable 'x'.

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

Add '-0.5' to each side of the equation.
0.5 + -0.5 + x = -0.372677996 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + x = -0.372677996 + -0.5
x = -0.372677996 + -0.5

Combine like terms: -0.372677996 + -0.5 = -0.872677996
x = -0.872677996

Simplifying
x = -0.872677996

Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {-0.127322004, -0.872677996}
Solution
x = {-0.127322004, -0.872677996}