a^2-12a+13=0

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Solution for a^2-12a+13=0 equation:


Simplifying
a2 + -12a + 13 = 0

Reorder the terms:
13 + -12a + a2 = 0

Solving
13 + -12a + a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '-13' to each side of the equation.
13 + -12a + -13 + a2 = 0 + -13

Reorder the terms:
13 + -13 + -12a + a2 = 0 + -13

Combine like terms: 13 + -13 = 0
0 + -12a + a2 = 0 + -13
-12a + a2 = 0 + -13

Combine like terms: 0 + -13 = -13
-12a + a2 = -13

The a term is -12a.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12a + 36 + a2 = -13 + 36

Reorder the terms:
36 + -12a + a2 = -13 + 36

Combine like terms: -13 + 36 = 23
36 + -12a + a2 = 23

Factor a perfect square on the left side:
(a + -6)(a + -6) = 23

Calculate the square root of the right side: 4.795831523

Break this problem into two subproblems by setting 
(a + -6) equal to 4.795831523 and -4.795831523.

Subproblem 1

a + -6 = 4.795831523 Simplifying a + -6 = 4.795831523 Reorder the terms: -6 + a = 4.795831523 Solving -6 + a = 4.795831523 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + a = 4.795831523 + 6 Combine like terms: -6 + 6 = 0 0 + a = 4.795831523 + 6 a = 4.795831523 + 6 Combine like terms: 4.795831523 + 6 = 10.795831523 a = 10.795831523 Simplifying a = 10.795831523

Subproblem 2

a + -6 = -4.795831523 Simplifying a + -6 = -4.795831523 Reorder the terms: -6 + a = -4.795831523 Solving -6 + a = -4.795831523 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + a = -4.795831523 + 6 Combine like terms: -6 + 6 = 0 0 + a = -4.795831523 + 6 a = -4.795831523 + 6 Combine like terms: -4.795831523 + 6 = 1.204168477 a = 1.204168477 Simplifying a = 1.204168477

Solution

The solution to the problem is based on the solutions from the subproblems. a = {10.795831523, 1.204168477}

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