x^2+6x-156=0

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Solution for x^2+6x-156=0 equation:


Simplifying
x2 + 6x + -156 = 0

Reorder the terms:
-156 + 6x + x2 = 0

Solving
-156 + 6x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '156' to each side of the equation.
-156 + 6x + 156 + x2 = 0 + 156

Reorder the terms:
-156 + 156 + 6x + x2 = 0 + 156

Combine like terms: -156 + 156 = 0
0 + 6x + x2 = 0 + 156
6x + x2 = 0 + 156

Combine like terms: 0 + 156 = 156
6x + x2 = 156

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 = 156 + 9

Reorder the terms:
9 + 6x + x2 = 156 + 9

Combine like terms: 156 + 9 = 165
9 + 6x + x2 = 165

Factor a perfect square on the left side:
(x + 3)(x + 3) = 165

Calculate the square root of the right side: 12.845232579

Break this problem into two subproblems by setting 
(x + 3) equal to 12.845232579 and -12.845232579.

Subproblem 1

x + 3 = 12.845232579 Simplifying x + 3 = 12.845232579 Reorder the terms: 3 + x = 12.845232579 Solving 3 + x = 12.845232579 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 = 12.845232579 + -3 Combine like terms: 3 + -3 = 0 0 + x = 12.845232579 + -3 x = 12.845232579 + -3 Combine like terms: 12.845232579 + -3 = 9.845232579 x = 9.845232579 Simplifying x = 9.845232579

Subproblem 2

x + 3 = -12.845232579 Simplifying x + 3 = -12.845232579 Reorder the terms: 3 + x = -12.845232579 Solving 3 + x = -12.845232579 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 = -12.845232579 + -3 Combine like terms: 3 + -3 = 0 0 + x = -12.845232579 + -3 x = -12.845232579 + -3 Combine like terms: -12.845232579 + -3 = -15.845232579 x = -15.845232579 Simplifying x = -15.845232579

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.845232579, -15.845232579}

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