x^2+6x=124

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Solution for x^2+6x=124 equation:


Simplifying
x2 + 6x = 124

Reorder the terms:
6x + x2 = 124

Solving
6x + x2 = 124

Solving for variable 'x'.

Reorder the terms:
-124 + 6x + x2 = 124 + -124

Combine like terms: 124 + -124 = 0
-124 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '124' to each side of the equation.
-124 + 6x + 124 + x2 = 0 + 124

Reorder the terms:
-124 + 124 + 6x + x2 = 0 + 124

Combine like terms: -124 + 124 = 0
0 + 6x + x2 = 0 + 124
6x + x2 = 0 + 124

Combine like terms: 0 + 124 = 124
6x + x2 = 124

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 124 + 9

Reorder the terms:
9 + 6x + x2 = 124 + 9

Combine like terms: 124 + 9 = 133
9 + 6x + x2 = 133

Factor a perfect square on the left side:
(x + 3)(x + 3) = 133

Calculate the square root of the right side: 11.532562595

Break this problem into two subproblems by setting 
(x + 3) equal to 11.532562595 and -11.532562595.

Subproblem 1

x + 3 = 11.532562595 Simplifying x + 3 = 11.532562595 Reorder the terms: 3 + x = 11.532562595 Solving 3 + x = 11.532562595 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 11.532562595 + -3 Combine like terms: 3 + -3 = 0 0 + x = 11.532562595 + -3 x = 11.532562595 + -3 Combine like terms: 11.532562595 + -3 = 8.532562595 x = 8.532562595 Simplifying x = 8.532562595

Subproblem 2

x + 3 = -11.532562595 Simplifying x + 3 = -11.532562595 Reorder the terms: 3 + x = -11.532562595 Solving 3 + x = -11.532562595 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -11.532562595 + -3 Combine like terms: 3 + -3 = 0 0 + x = -11.532562595 + -3 x = -11.532562595 + -3 Combine like terms: -11.532562595 + -3 = -14.532562595 x = -14.532562595 Simplifying x = -14.532562595

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.532562595, -14.532562595}

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