x^2-12x-228=0

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Solution for x^2-12x-228=0 equation:


Simplifying
x2 + -12x + -228 = 0

Reorder the terms:
-228 + -12x + x2 = 0

Solving
-228 + -12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '228' to each side of the equation.
-228 + -12x + 228 + x2 = 0 + 228

Reorder the terms:
-228 + 228 + -12x + x2 = 0 + 228

Combine like terms: -228 + 228 = 0
0 + -12x + x2 = 0 + 228
-12x + x2 = 0 + 228

Combine like terms: 0 + 228 = 228
-12x + x2 = 228

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 = 228 + 36

Reorder the terms:
36 + -12x + x2 = 228 + 36

Combine like terms: 228 + 36 = 264
36 + -12x + x2 = 264

Factor a perfect square on the left side:
(x + -6)(x + -6) = 264

Calculate the square root of the right side: 16.248076809

Break this problem into two subproblems by setting 
(x + -6) equal to 16.248076809 and -16.248076809.

Subproblem 1

x + -6 = 16.248076809 Simplifying x + -6 = 16.248076809 Reorder the terms: -6 + x = 16.248076809 Solving -6 + x = 16.248076809 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 = 16.248076809 + 6 Combine like terms: -6 + 6 = 0 0 + x = 16.248076809 + 6 x = 16.248076809 + 6 Combine like terms: 16.248076809 + 6 = 22.248076809 x = 22.248076809 Simplifying x = 22.248076809

Subproblem 2

x + -6 = -16.248076809 Simplifying x + -6 = -16.248076809 Reorder the terms: -6 + x = -16.248076809 Solving -6 + x = -16.248076809 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 = -16.248076809 + 6 Combine like terms: -6 + 6 = 0 0 + x = -16.248076809 + 6 x = -16.248076809 + 6 Combine like terms: -16.248076809 + 6 = -10.248076809 x = -10.248076809 Simplifying x = -10.248076809

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.248076809, -10.248076809}

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