x^2-12x-365=0

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Solution for x^2-12x-365=0 equation:


Simplifying
x2 + -12x + -365 = 0

Reorder the terms:
-365 + -12x + x2 = 0

Solving
-365 + -12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '365' to each side of the equation.
-365 + -12x + 365 + x2 = 0 + 365

Reorder the terms:
-365 + 365 + -12x + x2 = 0 + 365

Combine like terms: -365 + 365 = 0
0 + -12x + x2 = 0 + 365
-12x + x2 = 0 + 365

Combine like terms: 0 + 365 = 365
-12x + x2 = 365

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 = 365 + 36

Reorder the terms:
36 + -12x + x2 = 365 + 36

Combine like terms: 365 + 36 = 401
36 + -12x + x2 = 401

Factor a perfect square on the left side:
(x + -6)(x + -6) = 401

Calculate the square root of the right side: 20.024984395

Break this problem into two subproblems by setting 
(x + -6) equal to 20.024984395 and -20.024984395.

Subproblem 1

x + -6 = 20.024984395 Simplifying x + -6 = 20.024984395 Reorder the terms: -6 + x = 20.024984395 Solving -6 + x = 20.024984395 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 = 20.024984395 + 6 Combine like terms: -6 + 6 = 0 0 + x = 20.024984395 + 6 x = 20.024984395 + 6 Combine like terms: 20.024984395 + 6 = 26.024984395 x = 26.024984395 Simplifying x = 26.024984395

Subproblem 2

x + -6 = -20.024984395 Simplifying x + -6 = -20.024984395 Reorder the terms: -6 + x = -20.024984395 Solving -6 + x = -20.024984395 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 = -20.024984395 + 6 Combine like terms: -6 + 6 = 0 0 + x = -20.024984395 + 6 x = -20.024984395 + 6 Combine like terms: -20.024984395 + 6 = -14.024984395 x = -14.024984395 Simplifying x = -14.024984395

Solution

The solution to the problem is based on the solutions from the subproblems. x = {26.024984395, -14.024984395}

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