18x^2+36x+1=0

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Solution for 18x^2+36x+1=0 equation:


Simplifying
18x2 + 36x + 1 = 0

Reorder the terms:
1 + 36x + 18x2 = 0

Solving
1 + 36x + 18x2 = 0

Solving for variable 'x'.

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

Divide each side by '18'.
0.05555555556 + 2x + x2 = 0

Move the constant term to the right:

Add '-0.05555555556' to each side of the equation.
0.05555555556 + 2x + -0.05555555556 + x2 = 0 + -0.05555555556

Reorder the terms:
0.05555555556 + -0.05555555556 + 2x + x2 = 0 + -0.05555555556

Combine like terms: 0.05555555556 + -0.05555555556 = 0.00000000000
0.00000000000 + 2x + x2 = 0 + -0.05555555556
2x + x2 = 0 + -0.05555555556

Combine like terms: 0 + -0.05555555556 = -0.05555555556
2x + x2 = -0.05555555556

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = -0.05555555556 + 1

Reorder the terms:
1 + 2x + x2 = -0.05555555556 + 1

Combine like terms: -0.05555555556 + 1 = 0.94444444444
1 + 2x + x2 = 0.94444444444

Factor a perfect square on the left side:
(x + 1)(x + 1) = 0.94444444444

Calculate the square root of the right side: 0.971825316

Break this problem into two subproblems by setting 
(x + 1) equal to 0.971825316 and -0.971825316.

Subproblem 1

x + 1 = 0.971825316 Simplifying x + 1 = 0.971825316 Reorder the terms: 1 + x = 0.971825316 Solving 1 + x = 0.971825316 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 0.971825316 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0.971825316 + -1 x = 0.971825316 + -1 Combine like terms: 0.971825316 + -1 = -0.028174684 x = -0.028174684 Simplifying x = -0.028174684

Subproblem 2

x + 1 = -0.971825316 Simplifying x + 1 = -0.971825316 Reorder the terms: 1 + x = -0.971825316 Solving 1 + x = -0.971825316 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -0.971825316 + -1 Combine like terms: 1 + -1 = 0 0 + x = -0.971825316 + -1 x = -0.971825316 + -1 Combine like terms: -0.971825316 + -1 = -1.971825316 x = -1.971825316 Simplifying x = -1.971825316

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.028174684, -1.971825316}

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