12a^2-6=-5a

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Solution for 12a^2-6=-5a equation:


Simplifying
12a2 + -6 = -5a

Reorder the terms:
-6 + 12a2 = -5a

Solving
-6 + 12a2 = -5a

Solving for variable 'a'.

Reorder the terms:
-6 + 5a + 12a2 = -5a + 5a

Combine like terms: -5a + 5a = 0
-6 + 5a + 12a2 = 0

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

Divide each side by '12'.
-0.5 + 0.4166666667a + a2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + 0.4166666667a + 0.5 + a2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + 0.4166666667a + a2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + 0.4166666667a + a2 = 0 + 0.5
0.4166666667a + a2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
0.4166666667a + a2 = 0.5

The a term is 0.4166666667a.  Take half its coefficient (0.2083333334).
Square it (0.04340277781) and add it to both sides.

Add '0.04340277781' to each side of the equation.
0.4166666667a + 0.04340277781 + a2 = 0.5 + 0.04340277781

Reorder the terms:
0.04340277781 + 0.4166666667a + a2 = 0.5 + 0.04340277781

Combine like terms: 0.5 + 0.04340277781 = 0.54340277781
0.04340277781 + 0.4166666667a + a2 = 0.54340277781

Factor a perfect square on the left side:
(a + 0.2083333334)(a + 0.2083333334) = 0.54340277781

Calculate the square root of the right side: 0.737158584

Break this problem into two subproblems by setting 
(a + 0.2083333334) equal to 0.737158584 and -0.737158584.

Subproblem 1

a + 0.2083333334 = 0.737158584 Simplifying a + 0.2083333334 = 0.737158584 Reorder the terms: 0.2083333334 + a = 0.737158584 Solving 0.2083333334 + a = 0.737158584 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.2083333334' to each side of the equation. 0.2083333334 + -0.2083333334 + a = 0.737158584 + -0.2083333334 Combine like terms: 0.2083333334 + -0.2083333334 = 0.0000000000 0.0000000000 + a = 0.737158584 + -0.2083333334 a = 0.737158584 + -0.2083333334 Combine like terms: 0.737158584 + -0.2083333334 = 0.5288252506 a = 0.5288252506 Simplifying a = 0.5288252506

Subproblem 2

a + 0.2083333334 = -0.737158584 Simplifying a + 0.2083333334 = -0.737158584 Reorder the terms: 0.2083333334 + a = -0.737158584 Solving 0.2083333334 + a = -0.737158584 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.2083333334' to each side of the equation. 0.2083333334 + -0.2083333334 + a = -0.737158584 + -0.2083333334 Combine like terms: 0.2083333334 + -0.2083333334 = 0.0000000000 0.0000000000 + a = -0.737158584 + -0.2083333334 a = -0.737158584 + -0.2083333334 Combine like terms: -0.737158584 + -0.2083333334 = -0.9454919174 a = -0.9454919174 Simplifying a = -0.9454919174

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.5288252506, -0.9454919174}

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