x^2+12x-8=0

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Solution for x^2+12x-8=0 equation:


Simplifying
x2 + 12x + -8 = 0

Reorder the terms:
-8 + 12x + x2 = 0

Solving
-8 + 12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + 12x + 8 + x2 = 0 + 8

Reorder the terms:
-8 + 8 + 12x + x2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 12x + x2 = 0 + 8
12x + x2 = 0 + 8

Combine like terms: 0 + 8 = 8
12x + x2 = 8

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 = 8 + 36

Reorder the terms:
36 + 12x + x2 = 8 + 36

Combine like terms: 8 + 36 = 44
36 + 12x + x2 = 44

Factor a perfect square on the left side:
(x + 6)(x + 6) = 44

Calculate the square root of the right side: 6.633249581

Break this problem into two subproblems by setting 
(x + 6) equal to 6.633249581 and -6.633249581.

Subproblem 1

x + 6 = 6.633249581 Simplifying x + 6 = 6.633249581 Reorder the terms: 6 + x = 6.633249581 Solving 6 + x = 6.633249581 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 = 6.633249581 + -6 Combine like terms: 6 + -6 = 0 0 + x = 6.633249581 + -6 x = 6.633249581 + -6 Combine like terms: 6.633249581 + -6 = 0.633249581 x = 0.633249581 Simplifying x = 0.633249581

Subproblem 2

x + 6 = -6.633249581 Simplifying x + 6 = -6.633249581 Reorder the terms: 6 + x = -6.633249581 Solving 6 + x = -6.633249581 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 = -6.633249581 + -6 Combine like terms: 6 + -6 = 0 0 + x = -6.633249581 + -6 x = -6.633249581 + -6 Combine like terms: -6.633249581 + -6 = -12.633249581 x = -12.633249581 Simplifying x = -12.633249581

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.633249581, -12.633249581}

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