x^2+3x+1.5=0

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Solution for x^2+3x+1.5=0 equation:


Simplifying
x2 + 3x + 1.5 = 0

Reorder the terms:
1.5 + 3x + x2 = 0

Solving
1.5 + 3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + 3x + -1.5 + x2 = 0 + -1.5

Reorder the terms:
1.5 + -1.5 + 3x + x2 = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + 3x + x2 = 0 + -1.5
3x + x2 = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
3x + x2 = -1.5

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = -1.5 + 2.25

Reorder the terms:
2.25 + 3x + x2 = -1.5 + 2.25

Combine like terms: -1.5 + 2.25 = 0.75
2.25 + 3x + x2 = 0.75

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 0.75

Calculate the square root of the right side: 0.866025404

Break this problem into two subproblems by setting 
(x + 1.5) equal to 0.866025404 and -0.866025404.


Subproblem 1
x + 1.5 = 0.866025404

Simplifying
x + 1.5 = 0.866025404

Reorder the terms:
1.5 + x = 0.866025404

Solving
1.5 + x = 0.866025404

Solving for variable 'x'.

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

Add '-1.5' to each side of the equation.
1.5 + -1.5 + x = 0.866025404 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + x = 0.866025404 + -1.5
x = 0.866025404 + -1.5

Combine like terms: 0.866025404 + -1.5 = -0.633974596
x = -0.633974596

Simplifying
x = -0.633974596


Subproblem 2
x + 1.5 = -0.866025404

Simplifying
x + 1.5 = -0.866025404

Reorder the terms:
1.5 + x = -0.866025404

Solving
1.5 + x = -0.866025404

Solving for variable 'x'.

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

Add '-1.5' to each side of the equation.
1.5 + -1.5 + x = -0.866025404 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + x = -0.866025404 + -1.5
x = -0.866025404 + -1.5

Combine like terms: -0.866025404 + -1.5 = -2.366025404
x = -2.366025404

Simplifying
x = -2.366025404


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {-0.633974596, -2.366025404}

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