6x^2+6x-125=0

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Solution for 6x^2+6x-125=0 equation:


Simplifying
6x2 + 6x + -125 = 0

Reorder the terms:
-125 + 6x + 6x2 = 0

Solving
-125 + 6x + 6x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
6 the coefficient of the squared term: 

Divide each side by '6'.
-20.83333333 + x + x2 = 0

Move the constant term to the right:

Add '20.83333333' to each side of the equation.
-20.83333333 + x + 20.83333333 + x2 = 0 + 20.83333333

Reorder the terms:
-20.83333333 + 20.83333333 + x + x2 = 0 + 20.83333333

Combine like terms: -20.83333333 + 20.83333333 = 0.00000000
0.00000000 + x + x2 = 0 + 20.83333333
x + x2 = 0 + 20.83333333

Combine like terms: 0 + 20.83333333 = 20.83333333
x + x2 = 20.83333333

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + x2 = 20.83333333 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 20.83333333 + 0.25

Combine like terms: 20.83333333 + 0.25 = 21.08333333
1.25 + x2 = 21.08333333

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 21.08333333

Calculate the square root of the right side: 4.591659104

Break this problem into two subproblems by setting 
(x + 0.5) equal to 4.591659104 and -4.591659104.

Subproblem 1

x + 0.5 = 4.591659104 Simplifying x + 0.5 = 4.591659104 Reorder the terms: 0.5 + x = 4.591659104 Solving 0.5 + x = 4.591659104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 4.591659104 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 4.591659104 + -0.5 x = 4.591659104 + -0.5 Combine like terms: 4.591659104 + -0.5 = 4.091659104 x = 4.091659104 Simplifying x = 4.091659104

Subproblem 2

x + 0.5 = -4.591659104 Simplifying x + 0.5 = -4.591659104 Reorder the terms: 0.5 + x = -4.591659104 Solving 0.5 + x = -4.591659104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -4.591659104 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -4.591659104 + -0.5 x = -4.591659104 + -0.5 Combine like terms: -4.591659104 + -0.5 = -5.091659104 x = -5.091659104 Simplifying x = -5.091659104

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.091659104, -5.091659104}

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