9(3a+1)a=2

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Solution for 9(3a+1)a=2 equation:


Simplifying
9(3a + 1) * a = 2

Reorder the terms:
9(1 + 3a) * a = 2

Reorder the terms for easier multiplication:
9a(1 + 3a) = 2
(1 * 9a + 3a * 9a) = 2
(9a + 27a2) = 2

Solving
9a + 27a2 = 2

Solving for variable 'a'.

Reorder the terms:
-2 + 9a + 27a2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + 9a + 27a2 = 0

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

Divide each side by '27'.
-0.07407407407 + 0.3333333333a + a2 = 0

Move the constant term to the right:

Add '0.07407407407' to each side of the equation.
-0.07407407407 + 0.3333333333a + 0.07407407407 + a2 = 0 + 0.07407407407

Reorder the terms:
-0.07407407407 + 0.07407407407 + 0.3333333333a + a2 = 0 + 0.07407407407

Combine like terms: -0.07407407407 + 0.07407407407 = 0.00000000000
0.00000000000 + 0.3333333333a + a2 = 0 + 0.07407407407
0.3333333333a + a2 = 0 + 0.07407407407

Combine like terms: 0 + 0.07407407407 = 0.07407407407
0.3333333333a + a2 = 0.07407407407

The a term is 0.3333333333a.  Take half its coefficient (0.1666666667).
Square it (0.02777777779) and add it to both sides.

Add '0.02777777779' to each side of the equation.
0.3333333333a + 0.02777777779 + a2 = 0.07407407407 + 0.02777777779

Reorder the terms:
0.02777777779 + 0.3333333333a + a2 = 0.07407407407 + 0.02777777779

Combine like terms: 0.07407407407 + 0.02777777779 = 0.10185185186
0.02777777779 + 0.3333333333a + a2 = 0.10185185186

Factor a perfect square on the left side:
(a + 0.1666666667)(a + 0.1666666667) = 0.10185185186

Calculate the square root of the right side: 0.319142369

Break this problem into two subproblems by setting 
(a + 0.1666666667) equal to 0.319142369 and -0.319142369.

Subproblem 1

a + 0.1666666667 = 0.319142369 Simplifying a + 0.1666666667 = 0.319142369 Reorder the terms: 0.1666666667 + a = 0.319142369 Solving 0.1666666667 + a = 0.319142369 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.1666666667' to each side of the equation. 0.1666666667 + -0.1666666667 + a = 0.319142369 + -0.1666666667 Combine like terms: 0.1666666667 + -0.1666666667 = 0.0000000000 0.0000000000 + a = 0.319142369 + -0.1666666667 a = 0.319142369 + -0.1666666667 Combine like terms: 0.319142369 + -0.1666666667 = 0.1524757023 a = 0.1524757023 Simplifying a = 0.1524757023

Subproblem 2

a + 0.1666666667 = -0.319142369 Simplifying a + 0.1666666667 = -0.319142369 Reorder the terms: 0.1666666667 + a = -0.319142369 Solving 0.1666666667 + a = -0.319142369 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.1666666667' to each side of the equation. 0.1666666667 + -0.1666666667 + a = -0.319142369 + -0.1666666667 Combine like terms: 0.1666666667 + -0.1666666667 = 0.0000000000 0.0000000000 + a = -0.319142369 + -0.1666666667 a = -0.319142369 + -0.1666666667 Combine like terms: -0.319142369 + -0.1666666667 = -0.4858090357 a = -0.4858090357 Simplifying a = -0.4858090357

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.1524757023, -0.4858090357}

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