5x^2+36x+2=0

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Solution for 5x^2+36x+2=0 equation:


Simplifying
5x2 + 36x + 2 = 0

Reorder the terms:
2 + 36x + 5x2 = 0

Solving
2 + 36x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
0.4 + 7.2x + x2 = 0

Move the constant term to the right:

Add '-0.4' to each side of the equation.
0.4 + 7.2x + -0.4 + x2 = 0 + -0.4

Reorder the terms:
0.4 + -0.4 + 7.2x + x2 = 0 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + 7.2x + x2 = 0 + -0.4
7.2x + x2 = 0 + -0.4

Combine like terms: 0 + -0.4 = -0.4
7.2x + x2 = -0.4

The x term is 7.2x.  Take half its coefficient (3.6).
Square it (12.96) and add it to both sides.

Add '12.96' to each side of the equation.
7.2x + 12.96 + x2 = -0.4 + 12.96

Reorder the terms:
12.96 + 7.2x + x2 = -0.4 + 12.96

Combine like terms: -0.4 + 12.96 = 12.56
12.96 + 7.2x + x2 = 12.56

Factor a perfect square on the left side:
(x + 3.6)(x + 3.6) = 12.56

Calculate the square root of the right side: 3.544009029

Break this problem into two subproblems by setting 
(x + 3.6) equal to 3.544009029 and -3.544009029.

Subproblem 1

x + 3.6 = 3.544009029 Simplifying x + 3.6 = 3.544009029 Reorder the terms: 3.6 + x = 3.544009029 Solving 3.6 + x = 3.544009029 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.6' to each side of the equation. 3.6 + -3.6 + x = 3.544009029 + -3.6 Combine like terms: 3.6 + -3.6 = 0.0 0.0 + x = 3.544009029 + -3.6 x = 3.544009029 + -3.6 Combine like terms: 3.544009029 + -3.6 = -0.055990971 x = -0.055990971 Simplifying x = -0.055990971

Subproblem 2

x + 3.6 = -3.544009029 Simplifying x + 3.6 = -3.544009029 Reorder the terms: 3.6 + x = -3.544009029 Solving 3.6 + x = -3.544009029 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.6' to each side of the equation. 3.6 + -3.6 + x = -3.544009029 + -3.6 Combine like terms: 3.6 + -3.6 = 0.0 0.0 + x = -3.544009029 + -3.6 x = -3.544009029 + -3.6 Combine like terms: -3.544009029 + -3.6 = -7.144009029 x = -7.144009029 Simplifying x = -7.144009029

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.055990971, -7.144009029}

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