x^2+5x+3.125=0

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Solution for x^2+5x+3.125=0 equation: 


Simplifying
x2 + 5x + 3.125 = 0

Reorder the terms:
3.125 + 5x + x2 = 0

Solving
3.125 + 5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-3.125' to each side of the equation.
3.125 + 5x + -3.125 + x2 = 0 + -3.125

Reorder the terms:
3.125 + -3.125 + 5x + x2 = 0 + -3.125

Combine like terms: 3.125 + -3.125 = 0.000
0.000 + 5x + x2 = 0 + -3.125
5x + x2 = 0 + -3.125

Combine like terms: 0 + -3.125 = -3.125
5x + x2 = -3.125

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = -3.125 + 6.25

Reorder the terms:
6.25 + 5x + x2 = -3.125 + 6.25

Combine like terms: -3.125 + 6.25 = 3.125
6.25 + 5x + x2 = 3.125

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 3.125

Calculate the square root of the right side: 1.767766953

Break this problem into two subproblems by setting 
(x + 2.5) equal to 1.767766953 and -1.767766953.


Subproblem 1
x + 2.5 = 1.767766953

Simplifying
x + 2.5 = 1.767766953

Reorder the terms:
2.5 + x = 1.767766953

Solving
2.5 + x = 1.767766953

Solving for variable 'x'.

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

Add '-2.5' to each side of the equation.
2.5 + -2.5 + x = 1.767766953 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + x = 1.767766953 + -2.5
x = 1.767766953 + -2.5

Combine like terms: 1.767766953 + -2.5 = -0.732233047
x = -0.732233047

Simplifying
x = -0.732233047


Subproblem 2
x + 2.5 = -1.767766953

Simplifying
x + 2.5 = -1.767766953

Reorder the terms:
2.5 + x = -1.767766953

Solving
2.5 + x = -1.767766953

Solving for variable 'x'.

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

Add '-2.5' to each side of the equation.
2.5 + -2.5 + x = -1.767766953 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + x = -1.767766953 + -2.5
x = -1.767766953 + -2.5

Combine like terms: -1.767766953 + -2.5 = -4.267766953
x = -4.267766953

Simplifying
x = -4.267766953


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {-0.732233047, -4.267766953}

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