.5x^2+1.5x-2=0

Solution for .5x^2+1.5x-2=0 equation:

Simplifying
0.5x2 + 1.5x + -2 = 0

Reorder the terms:
-2 + 1.5x + 0.5x2 = 0

Solving
-2 + 1.5x + 0.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.5'.
-4 + 3x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 3x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + 3x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 3x + x2 = 0 + 4
3x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
3x + x2 = 4

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 = 4 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 4 + 2.25

Combine like terms: 4 + 2.25 = 6.25
2.25 + 3x + x2 = 6.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 6.25

Calculate the square root of the right side: 2.5

Break this problem into two subproblems by setting 
(x + 1.5) equal to 2.5 and -2.5.

Subproblem 1
x + 1.5 = 2.5

Simplifying
x + 1.5 = 2.5

Reorder the terms:
1.5 + x = 2.5

Solving
1.5 + x = 2.5

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 = 2.5 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + x = 2.5 + -1.5
x = 2.5 + -1.5

Combine like terms: 2.5 + -1.5 = 1
x = 1

Simplifying
x = 1

Subproblem 2
x + 1.5 = -2.5

Simplifying
x + 1.5 = -2.5

Reorder the terms:
1.5 + x = -2.5

Solving
1.5 + x = -2.5

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 = -2.5 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + x = -2.5 + -1.5
x = -2.5 + -1.5

Combine like terms: -2.5 + -1.5 = -4
x = -4

Simplifying
x = -4

Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {1, -4}