X^2+.166X-.166=0

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Solution for X^2+.166X-.166=0 equation:


Simplifying
X2 + 0.166X + -0.166 = 0

Reorder the terms:
-0.166 + 0.166X + X2 = 0

Solving
-0.166 + 0.166X + X2 = 0

Solving for variable 'X'.

Begin completing the square.

Move the constant term to the right:

Add '0.166' to each side of the equation.
-0.166 + 0.166X + 0.166 + X2 = 0 + 0.166

Reorder the terms:
-0.166 + 0.166 + 0.166X + X2 = 0 + 0.166

Combine like terms: -0.166 + 0.166 = 0.000
0.000 + 0.166X + X2 = 0 + 0.166
0.166X + X2 = 0 + 0.166

Combine like terms: 0 + 0.166 = 0.166
0.166X + X2 = 0.166

The X term is 0.166X.  Take half its coefficient (0.083).
Square it (0.006889) and add it to both sides.

Add '0.006889' to each side of the equation.
0.166X + 0.006889 + X2 = 0.166 + 0.006889

Reorder the terms:
0.006889 + 0.166X + X2 = 0.166 + 0.006889

Combine like terms: 0.166 + 0.006889 = 0.172889
0.006889 + 0.166X + X2 = 0.172889

Factor a perfect square on the left side:
(X + 0.083)(X + 0.083) = 0.172889

Calculate the square root of the right side: 0.41579923

Break this problem into two subproblems by setting 
(X + 0.083) equal to 0.41579923 and -0.41579923.

Subproblem 1

X + 0.083 = 0.41579923 Simplifying X + 0.083 = 0.41579923 Reorder the terms: 0.083 + X = 0.41579923 Solving 0.083 + X = 0.41579923 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.083' to each side of the equation. 0.083 + -0.083 + X = 0.41579923 + -0.083 Combine like terms: 0.083 + -0.083 = 0.000 0.000 + X = 0.41579923 + -0.083 X = 0.41579923 + -0.083 Combine like terms: 0.41579923 + -0.083 = 0.33279923 X = 0.33279923 Simplifying X = 0.33279923

Subproblem 2

X + 0.083 = -0.41579923 Simplifying X + 0.083 = -0.41579923 Reorder the terms: 0.083 + X = -0.41579923 Solving 0.083 + X = -0.41579923 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.083' to each side of the equation. 0.083 + -0.083 + X = -0.41579923 + -0.083 Combine like terms: 0.083 + -0.083 = 0.000 0.000 + X = -0.41579923 + -0.083 X = -0.41579923 + -0.083 Combine like terms: -0.41579923 + -0.083 = -0.49879923 X = -0.49879923 Simplifying X = -0.49879923

Solution

The solution to the problem is based on the solutions from the subproblems. X = {0.33279923, -0.49879923}

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