-x^2-12x+5=0

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Solution for -x^2-12x+5=0 equation:


Simplifying
-1x2 + -12x + 5 = 0

Reorder the terms:
5 + -12x + -1x2 = 0

Solving
5 + -12x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-5 + 12x + x2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + 12x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + 12x + x2 = 0 + 5

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

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

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 = 5 + 36

Reorder the terms:
36 + 12x + x2 = 5 + 36

Combine like terms: 5 + 36 = 41
36 + 12x + x2 = 41

Factor a perfect square on the left side:
(x + 6)(x + 6) = 41

Calculate the square root of the right side: 6.403124237

Break this problem into two subproblems by setting 
(x + 6) equal to 6.403124237 and -6.403124237.

Subproblem 1

x + 6 = 6.403124237 Simplifying x + 6 = 6.403124237 Reorder the terms: 6 + x = 6.403124237 Solving 6 + x = 6.403124237 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 = 6.403124237 + -6 Combine like terms: 6 + -6 = 0 0 + x = 6.403124237 + -6 x = 6.403124237 + -6 Combine like terms: 6.403124237 + -6 = 0.403124237 x = 0.403124237 Simplifying x = 0.403124237

Subproblem 2

x + 6 = -6.403124237 Simplifying x + 6 = -6.403124237 Reorder the terms: 6 + x = -6.403124237 Solving 6 + x = -6.403124237 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 = -6.403124237 + -6 Combine like terms: 6 + -6 = 0 0 + x = -6.403124237 + -6 x = -6.403124237 + -6 Combine like terms: -6.403124237 + -6 = -12.403124237 x = -12.403124237 Simplifying x = -12.403124237

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.403124237, -12.403124237}

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