4x^2+36x+1=0

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Solution for 4x^2+36x+1=0 equation:


Simplifying
4x2 + 36x + 1 = 0

Reorder the terms:
1 + 36x + 4x2 = 0

Solving
1 + 36x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
0.25 + 9x + x2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + 9x + -0.25 + x2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + 9x + x2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + 9x + x2 = 0 + -0.25
9x + x2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
9x + x2 = -0.25

The x term is 9x.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9x + 20.25 + x2 = -0.25 + 20.25

Reorder the terms:
20.25 + 9x + x2 = -0.25 + 20.25

Combine like terms: -0.25 + 20.25 = 20
20.25 + 9x + x2 = 20

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 20

Calculate the square root of the right side: 4.472135955

Break this problem into two subproblems by setting 
(x + 4.5) equal to 4.472135955 and -4.472135955.

Subproblem 1

x + 4.5 = 4.472135955 Simplifying x + 4.5 = 4.472135955 Reorder the terms: 4.5 + x = 4.472135955 Solving 4.5 + x = 4.472135955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = 4.472135955 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 4.472135955 + -4.5 x = 4.472135955 + -4.5 Combine like terms: 4.472135955 + -4.5 = -0.027864045 x = -0.027864045 Simplifying x = -0.027864045

Subproblem 2

x + 4.5 = -4.472135955 Simplifying x + 4.5 = -4.472135955 Reorder the terms: 4.5 + x = -4.472135955 Solving 4.5 + x = -4.472135955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = -4.472135955 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -4.472135955 + -4.5 x = -4.472135955 + -4.5 Combine like terms: -4.472135955 + -4.5 = -8.972135955 x = -8.972135955 Simplifying x = -8.972135955

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.027864045, -8.972135955}

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