3a^2+4=12a

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Solution for 3a^2+4=12a equation:


Simplifying
3a2 + 4 = 12a

Reorder the terms:
4 + 3a2 = 12a

Solving
4 + 3a2 = 12a

Solving for variable 'a'.

Reorder the terms:
4 + -12a + 3a2 = 12a + -12a

Combine like terms: 12a + -12a = 0
4 + -12a + 3a2 = 0

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

Divide each side by '3'.
1.333333333 + -4a + a2 = 0

Move the constant term to the right:

Add '-1.333333333' to each side of the equation.
1.333333333 + -4a + -1.333333333 + a2 = 0 + -1.333333333

Reorder the terms:
1.333333333 + -1.333333333 + -4a + a2 = 0 + -1.333333333

Combine like terms: 1.333333333 + -1.333333333 = 0.000000000
0.000000000 + -4a + a2 = 0 + -1.333333333
-4a + a2 = 0 + -1.333333333

Combine like terms: 0 + -1.333333333 = -1.333333333
-4a + a2 = -1.333333333

The a term is -4a.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4a + 4 + a2 = -1.333333333 + 4

Reorder the terms:
4 + -4a + a2 = -1.333333333 + 4

Combine like terms: -1.333333333 + 4 = 2.666666667
4 + -4a + a2 = 2.666666667

Factor a perfect square on the left side:
(a + -2)(a + -2) = 2.666666667

Calculate the square root of the right side: 1.632993162

Break this problem into two subproblems by setting 
(a + -2) equal to 1.632993162 and -1.632993162.

Subproblem 1

a + -2 = 1.632993162 Simplifying a + -2 = 1.632993162 Reorder the terms: -2 + a = 1.632993162 Solving -2 + a = 1.632993162 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + a = 1.632993162 + 2 Combine like terms: -2 + 2 = 0 0 + a = 1.632993162 + 2 a = 1.632993162 + 2 Combine like terms: 1.632993162 + 2 = 3.632993162 a = 3.632993162 Simplifying a = 3.632993162

Subproblem 2

a + -2 = -1.632993162 Simplifying a + -2 = -1.632993162 Reorder the terms: -2 + a = -1.632993162 Solving -2 + a = -1.632993162 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + a = -1.632993162 + 2 Combine like terms: -2 + 2 = 0 0 + a = -1.632993162 + 2 a = -1.632993162 + 2 Combine like terms: -1.632993162 + 2 = 0.367006838 a = 0.367006838 Simplifying a = 0.367006838

Solution

The solution to the problem is based on the solutions from the subproblems. a = {3.632993162, 0.367006838}

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