3x^2=-6x-2

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Solution for 3x^2=-6x-2 equation:


Simplifying
3x2 = -6x + -2

Reorder the terms:
3x2 = -2 + -6x

Solving
3x2 = -2 + -6x

Solving for variable 'x'.

Reorder the terms:
2 + 6x + 3x2 = -2 + -6x + 2 + 6x

Reorder the terms:
2 + 6x + 3x2 = -2 + 2 + -6x + 6x

Combine like terms: -2 + 2 = 0
2 + 6x + 3x2 = 0 + -6x + 6x
2 + 6x + 3x2 = -6x + 6x

Combine like terms: -6x + 6x = 0
2 + 6x + 3x2 = 0

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

Divide each side by '3'.
0.6666666667 + 2x + x2 = 0

Move the constant term to the right:

Add '-0.6666666667' to each side of the equation.
0.6666666667 + 2x + -0.6666666667 + x2 = 0 + -0.6666666667

Reorder the terms:
0.6666666667 + -0.6666666667 + 2x + x2 = 0 + -0.6666666667

Combine like terms: 0.6666666667 + -0.6666666667 = 0.0000000000
0.0000000000 + 2x + x2 = 0 + -0.6666666667
2x + x2 = 0 + -0.6666666667

Combine like terms: 0 + -0.6666666667 = -0.6666666667
2x + x2 = -0.6666666667

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = -0.6666666667 + 1

Reorder the terms:
1 + 2x + x2 = -0.6666666667 + 1

Combine like terms: -0.6666666667 + 1 = 0.3333333333
1 + 2x + x2 = 0.3333333333

Factor a perfect square on the left side:
(x + 1)(x + 1) = 0.3333333333

Calculate the square root of the right side: 0.577350269

Break this problem into two subproblems by setting 
(x + 1) equal to 0.577350269 and -0.577350269.

Subproblem 1

x + 1 = 0.577350269 Simplifying x + 1 = 0.577350269 Reorder the terms: 1 + x = 0.577350269 Solving 1 + x = 0.577350269 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 0.577350269 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0.577350269 + -1 x = 0.577350269 + -1 Combine like terms: 0.577350269 + -1 = -0.422649731 x = -0.422649731 Simplifying x = -0.422649731

Subproblem 2

x + 1 = -0.577350269 Simplifying x + 1 = -0.577350269 Reorder the terms: 1 + x = -0.577350269 Solving 1 + x = -0.577350269 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -0.577350269 + -1 Combine like terms: 1 + -1 = 0 0 + x = -0.577350269 + -1 x = -0.577350269 + -1 Combine like terms: -0.577350269 + -1 = -1.577350269 x = -1.577350269 Simplifying x = -1.577350269

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.422649731, -1.577350269}

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