-x^2-12x+17=0

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Solution for -x^2-12x+17=0 equation:


Simplifying
-1x2 + -12x + 17 = 0

Reorder the terms:
17 + -12x + -1x2 = 0

Solving
17 + -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'.
-17 + 12x + x2 = 0

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + 12x + 17 + x2 = 0 + 17

Reorder the terms:
-17 + 17 + 12x + x2 = 0 + 17

Combine like terms: -17 + 17 = 0
0 + 12x + x2 = 0 + 17
12x + x2 = 0 + 17

Combine like terms: 0 + 17 = 17
12x + x2 = 17

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 = 17 + 36

Reorder the terms:
36 + 12x + x2 = 17 + 36

Combine like terms: 17 + 36 = 53
36 + 12x + x2 = 53

Factor a perfect square on the left side:
(x + 6)(x + 6) = 53

Calculate the square root of the right side: 7.280109889

Break this problem into two subproblems by setting 
(x + 6) equal to 7.280109889 and -7.280109889.

Subproblem 1

x + 6 = 7.280109889 Simplifying x + 6 = 7.280109889 Reorder the terms: 6 + x = 7.280109889 Solving 6 + x = 7.280109889 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 = 7.280109889 + -6 Combine like terms: 6 + -6 = 0 0 + x = 7.280109889 + -6 x = 7.280109889 + -6 Combine like terms: 7.280109889 + -6 = 1.280109889 x = 1.280109889 Simplifying x = 1.280109889

Subproblem 2

x + 6 = -7.280109889 Simplifying x + 6 = -7.280109889 Reorder the terms: 6 + x = -7.280109889 Solving 6 + x = -7.280109889 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 = -7.280109889 + -6 Combine like terms: 6 + -6 = 0 0 + x = -7.280109889 + -6 x = -7.280109889 + -6 Combine like terms: -7.280109889 + -6 = -13.280109889 x = -13.280109889 Simplifying x = -13.280109889

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.280109889, -13.280109889}

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