x^2-12x-169=0

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Solution for x^2-12x-169=0 equation:


Simplifying
x2 + -12x + -169 = 0

Reorder the terms:
-169 + -12x + x2 = 0

Solving
-169 + -12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '169' to each side of the equation.
-169 + -12x + 169 + x2 = 0 + 169

Reorder the terms:
-169 + 169 + -12x + x2 = 0 + 169

Combine like terms: -169 + 169 = 0
0 + -12x + x2 = 0 + 169
-12x + x2 = 0 + 169

Combine like terms: 0 + 169 = 169
-12x + x2 = 169

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 = 169 + 36

Reorder the terms:
36 + -12x + x2 = 169 + 36

Combine like terms: 169 + 36 = 205
36 + -12x + x2 = 205

Factor a perfect square on the left side:
(x + -6)(x + -6) = 205

Calculate the square root of the right side: 14.317821063

Break this problem into two subproblems by setting 
(x + -6) equal to 14.317821063 and -14.317821063.

Subproblem 1

x + -6 = 14.317821063 Simplifying x + -6 = 14.317821063 Reorder the terms: -6 + x = 14.317821063 Solving -6 + x = 14.317821063 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 = 14.317821063 + 6 Combine like terms: -6 + 6 = 0 0 + x = 14.317821063 + 6 x = 14.317821063 + 6 Combine like terms: 14.317821063 + 6 = 20.317821063 x = 20.317821063 Simplifying x = 20.317821063

Subproblem 2

x + -6 = -14.317821063 Simplifying x + -6 = -14.317821063 Reorder the terms: -6 + x = -14.317821063 Solving -6 + x = -14.317821063 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 = -14.317821063 + 6 Combine like terms: -6 + 6 = 0 0 + x = -14.317821063 + 6 x = -14.317821063 + 6 Combine like terms: -14.317821063 + 6 = -8.317821063 x = -8.317821063 Simplifying x = -8.317821063

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20.317821063, -8.317821063}

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