x^2+12x-164=0

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Solution for x^2+12x-164=0 equation:


Simplifying
x2 + 12x + -164 = 0

Reorder the terms:
-164 + 12x + x2 = 0

Solving
-164 + 12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '164' to each side of the equation.
-164 + 12x + 164 + x2 = 0 + 164

Reorder the terms:
-164 + 164 + 12x + x2 = 0 + 164

Combine like terms: -164 + 164 = 0
0 + 12x + x2 = 0 + 164
12x + x2 = 0 + 164

Combine like terms: 0 + 164 = 164
12x + x2 = 164

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 = 164 + 36

Reorder the terms:
36 + 12x + x2 = 164 + 36

Combine like terms: 164 + 36 = 200
36 + 12x + x2 = 200

Factor a perfect square on the left side:
(x + 6)(x + 6) = 200

Calculate the square root of the right side: 14.142135624

Break this problem into two subproblems by setting 
(x + 6) equal to 14.142135624 and -14.142135624.

Subproblem 1

x + 6 = 14.142135624 Simplifying x + 6 = 14.142135624 Reorder the terms: 6 + x = 14.142135624 Solving 6 + x = 14.142135624 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 = 14.142135624 + -6 Combine like terms: 6 + -6 = 0 0 + x = 14.142135624 + -6 x = 14.142135624 + -6 Combine like terms: 14.142135624 + -6 = 8.142135624 x = 8.142135624 Simplifying x = 8.142135624

Subproblem 2

x + 6 = -14.142135624 Simplifying x + 6 = -14.142135624 Reorder the terms: 6 + x = -14.142135624 Solving 6 + x = -14.142135624 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 = -14.142135624 + -6 Combine like terms: 6 + -6 = 0 0 + x = -14.142135624 + -6 x = -14.142135624 + -6 Combine like terms: -14.142135624 + -6 = -20.142135624 x = -20.142135624 Simplifying x = -20.142135624

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.142135624, -20.142135624}

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