x^2-116=-6x

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Solution for x^2-116=-6x equation:


Simplifying
x2 + -116 = -6x

Reorder the terms:
-116 + x2 = -6x

Solving
-116 + x2 = -6x

Solving for variable 'x'.

Reorder the terms:
-116 + 6x + x2 = -6x + 6x

Combine like terms: -6x + 6x = 0
-116 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '116' to each side of the equation.
-116 + 6x + 116 + x2 = 0 + 116

Reorder the terms:
-116 + 116 + 6x + x2 = 0 + 116

Combine like terms: -116 + 116 = 0
0 + 6x + x2 = 0 + 116
6x + x2 = 0 + 116

Combine like terms: 0 + 116 = 116
6x + x2 = 116

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 = 116 + 9

Reorder the terms:
9 + 6x + x2 = 116 + 9

Combine like terms: 116 + 9 = 125
9 + 6x + x2 = 125

Factor a perfect square on the left side:
(x + 3)(x + 3) = 125

Calculate the square root of the right side: 11.180339887

Break this problem into two subproblems by setting 
(x + 3) equal to 11.180339887 and -11.180339887.

Subproblem 1

x + 3 = 11.180339887 Simplifying x + 3 = 11.180339887 Reorder the terms: 3 + x = 11.180339887 Solving 3 + x = 11.180339887 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 = 11.180339887 + -3 Combine like terms: 3 + -3 = 0 0 + x = 11.180339887 + -3 x = 11.180339887 + -3 Combine like terms: 11.180339887 + -3 = 8.180339887 x = 8.180339887 Simplifying x = 8.180339887

Subproblem 2

x + 3 = -11.180339887 Simplifying x + 3 = -11.180339887 Reorder the terms: 3 + x = -11.180339887 Solving 3 + x = -11.180339887 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 = -11.180339887 + -3 Combine like terms: 3 + -3 = 0 0 + x = -11.180339887 + -3 x = -11.180339887 + -3 Combine like terms: -11.180339887 + -3 = -14.180339887 x = -14.180339887 Simplifying x = -14.180339887

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.180339887, -14.180339887}

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