x^2-.667x-2.889=0

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Solution for x^2-.667x-2.889=0 equation:


Simplifying
x2 + -0.667x + -2.889 = 0

Reorder the terms:
-2.889 + -0.667x + x2 = 0

Solving
-2.889 + -0.667x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '2.889' to each side of the equation.
-2.889 + -0.667x + 2.889 + x2 = 0 + 2.889

Reorder the terms:
-2.889 + 2.889 + -0.667x + x2 = 0 + 2.889

Combine like terms: -2.889 + 2.889 = 0.000
0.000 + -0.667x + x2 = 0 + 2.889
-0.667x + x2 = 0 + 2.889

Combine like terms: 0 + 2.889 = 2.889
-0.667x + x2 = 2.889

The x term is -0.667x.  Take half its coefficient (-0.3335).
Square it (0.11122225) and add it to both sides.

Add '0.11122225' to each side of the equation.
-0.667x + 0.11122225 + x2 = 2.889 + 0.11122225

Reorder the terms:
0.11122225 + -0.667x + x2 = 2.889 + 0.11122225

Combine like terms: 2.889 + 0.11122225 = 3.00022225
0.11122225 + -0.667x + x2 = 3.00022225

Factor a perfect square on the left side:
(x + -0.3335)(x + -0.3335) = 3.00022225

Calculate the square root of the right side: 1.732114964

Break this problem into two subproblems by setting 
(x + -0.3335) equal to 1.732114964 and -1.732114964.

Subproblem 1

x + -0.3335 = 1.732114964 Simplifying x + -0.3335 = 1.732114964 Reorder the terms: -0.3335 + x = 1.732114964 Solving -0.3335 + x = 1.732114964 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3335' to each side of the equation. -0.3335 + 0.3335 + x = 1.732114964 + 0.3335 Combine like terms: -0.3335 + 0.3335 = 0.0000 0.0000 + x = 1.732114964 + 0.3335 x = 1.732114964 + 0.3335 Combine like terms: 1.732114964 + 0.3335 = 2.065614964 x = 2.065614964 Simplifying x = 2.065614964

Subproblem 2

x + -0.3335 = -1.732114964 Simplifying x + -0.3335 = -1.732114964 Reorder the terms: -0.3335 + x = -1.732114964 Solving -0.3335 + x = -1.732114964 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3335' to each side of the equation. -0.3335 + 0.3335 + x = -1.732114964 + 0.3335 Combine like terms: -0.3335 + 0.3335 = 0.0000 0.0000 + x = -1.732114964 + 0.3335 x = -1.732114964 + 0.3335 Combine like terms: -1.732114964 + 0.3335 = -1.398614964 x = -1.398614964 Simplifying x = -1.398614964

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.065614964, -1.398614964}

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