x^2-.666x-3.222=0

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Solution for x^2-.666x-3.222=0 equation:


Simplifying
x2 + -0.666x + -3.222 = 0

Reorder the terms:
-3.222 + -0.666x + x2 = 0

Solving
-3.222 + -0.666x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '3.222' to each side of the equation.
-3.222 + -0.666x + 3.222 + x2 = 0 + 3.222

Reorder the terms:
-3.222 + 3.222 + -0.666x + x2 = 0 + 3.222

Combine like terms: -3.222 + 3.222 = 0.000
0.000 + -0.666x + x2 = 0 + 3.222
-0.666x + x2 = 0 + 3.222

Combine like terms: 0 + 3.222 = 3.222
-0.666x + x2 = 3.222

The x term is -0.666x.  Take half its coefficient (-0.333).
Square it (0.110889) and add it to both sides.

Add '0.110889' to each side of the equation.
-0.666x + 0.110889 + x2 = 3.222 + 0.110889

Reorder the terms:
0.110889 + -0.666x + x2 = 3.222 + 0.110889

Combine like terms: 3.222 + 0.110889 = 3.332889
0.110889 + -0.666x + x2 = 3.332889

Factor a perfect square on the left side:
(x + -0.333)(x + -0.333) = 3.332889

Calculate the square root of the right side: 1.825620169

Break this problem into two subproblems by setting 
(x + -0.333) equal to 1.825620169 and -1.825620169.

Subproblem 1

x + -0.333 = 1.825620169 Simplifying x + -0.333 = 1.825620169 Reorder the terms: -0.333 + x = 1.825620169 Solving -0.333 + x = 1.825620169 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.333' to each side of the equation. -0.333 + 0.333 + x = 1.825620169 + 0.333 Combine like terms: -0.333 + 0.333 = 0.000 0.000 + x = 1.825620169 + 0.333 x = 1.825620169 + 0.333 Combine like terms: 1.825620169 + 0.333 = 2.158620169 x = 2.158620169 Simplifying x = 2.158620169

Subproblem 2

x + -0.333 = -1.825620169 Simplifying x + -0.333 = -1.825620169 Reorder the terms: -0.333 + x = -1.825620169 Solving -0.333 + x = -1.825620169 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.333' to each side of the equation. -0.333 + 0.333 + x = -1.825620169 + 0.333 Combine like terms: -0.333 + 0.333 = 0.000 0.000 + x = -1.825620169 + 0.333 x = -1.825620169 + 0.333 Combine like terms: -1.825620169 + 0.333 = -1.492620169 x = -1.492620169 Simplifying x = -1.492620169

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.158620169, -1.492620169}

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