3*a^2-6*a-2=0

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Solution for 3*a^2-6*a-2=0 equation:


Simplifying
3a2 + -6a + -2 = 0

Reorder the terms:
-2 + -6a + 3a2 = 0

Solving
-2 + -6a + 3a2 = 0

Solving for variable 'a'.

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

Divide each side by '3'.
-0.6666666667 + -2a + a2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + -2a + 0.6666666667 + a2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + -2a + a2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + -2a + a2 = 0 + 0.6666666667
-2a + a2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
-2a + a2 = 0.6666666667

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

Add '1' to each side of the equation.
-2a + 1 + a2 = 0.6666666667 + 1

Reorder the terms:
1 + -2a + a2 = 0.6666666667 + 1

Combine like terms: 0.6666666667 + 1 = 1.6666666667
1 + -2a + a2 = 1.6666666667

Factor a perfect square on the left side:
(a + -1)(a + -1) = 1.6666666667

Calculate the square root of the right side: 1.290994449

Break this problem into two subproblems by setting 
(a + -1) equal to 1.290994449 and -1.290994449.

Subproblem 1

a + -1 = 1.290994449 Simplifying a + -1 = 1.290994449 Reorder the terms: -1 + a = 1.290994449 Solving -1 + a = 1.290994449 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + a = 1.290994449 + 1 Combine like terms: -1 + 1 = 0 0 + a = 1.290994449 + 1 a = 1.290994449 + 1 Combine like terms: 1.290994449 + 1 = 2.290994449 a = 2.290994449 Simplifying a = 2.290994449

Subproblem 2

a + -1 = -1.290994449 Simplifying a + -1 = -1.290994449 Reorder the terms: -1 + a = -1.290994449 Solving -1 + a = -1.290994449 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + a = -1.290994449 + 1 Combine like terms: -1 + 1 = 0 0 + a = -1.290994449 + 1 a = -1.290994449 + 1 Combine like terms: -1.290994449 + 1 = -0.290994449 a = -0.290994449 Simplifying a = -0.290994449

Solution

The solution to the problem is based on the solutions from the subproblems. a = {2.290994449, -0.290994449}

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