x^2-12x+9=5

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Solution for x^2-12x+9=5 equation:


Simplifying
x2 + -12x + 9 = 5

Reorder the terms:
9 + -12x + x2 = 5

Solving
9 + -12x + x2 = 5

Solving for variable 'x'.

Reorder the terms:
9 + -5 + -12x + x2 = 5 + -5

Combine like terms: 9 + -5 = 4
4 + -12x + x2 = 5 + -5

Combine like terms: 5 + -5 = 0
4 + -12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + -12x + -4 + x2 = 0 + -4

Reorder the terms:
4 + -4 + -12x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -12x + x2 = 0 + -4
-12x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4
-12x + x2 = -4

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

Add '36' to each side of the equation.
-12x + 36 + x2 = -4 + 36

Reorder the terms:
36 + -12x + x2 = -4 + 36

Combine like terms: -4 + 36 = 32
36 + -12x + x2 = 32

Factor a perfect square on the left side:
(x + -6)(x + -6) = 32

Calculate the square root of the right side: 5.656854249

Break this problem into two subproblems by setting 
(x + -6) equal to 5.656854249 and -5.656854249.

Subproblem 1

x + -6 = 5.656854249 Simplifying x + -6 = 5.656854249 Reorder the terms: -6 + x = 5.656854249 Solving -6 + x = 5.656854249 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = 5.656854249 + 6 Combine like terms: -6 + 6 = 0 0 + x = 5.656854249 + 6 x = 5.656854249 + 6 Combine like terms: 5.656854249 + 6 = 11.656854249 x = 11.656854249 Simplifying x = 11.656854249

Subproblem 2

x + -6 = -5.656854249 Simplifying x + -6 = -5.656854249 Reorder the terms: -6 + x = -5.656854249 Solving -6 + x = -5.656854249 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = -5.656854249 + 6 Combine like terms: -6 + 6 = 0 0 + x = -5.656854249 + 6 x = -5.656854249 + 6 Combine like terms: -5.656854249 + 6 = 0.343145751 x = 0.343145751 Simplifying x = 0.343145751

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.656854249, 0.343145751}

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