6x^2-3x-86=0

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Solution for 6x^2-3x-86=0 equation:


Simplifying
6x2 + -3x + -86 = 0

Reorder the terms:
-86 + -3x + 6x2 = 0

Solving
-86 + -3x + 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'.
-14.33333333 + -0.5x + x2 = 0

Move the constant term to the right:

Add '14.33333333' to each side of the equation.
-14.33333333 + -0.5x + 14.33333333 + x2 = 0 + 14.33333333

Reorder the terms:
-14.33333333 + 14.33333333 + -0.5x + x2 = 0 + 14.33333333

Combine like terms: -14.33333333 + 14.33333333 = 0.00000000
0.00000000 + -0.5x + x2 = 0 + 14.33333333
-0.5x + x2 = 0 + 14.33333333

Combine like terms: 0 + 14.33333333 = 14.33333333
-0.5x + x2 = 14.33333333

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 14.33333333 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 14.33333333 + 0.0625

Combine like terms: 14.33333333 + 0.0625 = 14.39583333
0.0625 + -0.5x + x2 = 14.39583333

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 14.39583333

Calculate the square root of the right side: 3.794184146

Break this problem into two subproblems by setting 
(x + -0.25) equal to 3.794184146 and -3.794184146.

Subproblem 1

x + -0.25 = 3.794184146 Simplifying x + -0.25 = 3.794184146 Reorder the terms: -0.25 + x = 3.794184146 Solving -0.25 + x = 3.794184146 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 3.794184146 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 3.794184146 + 0.25 x = 3.794184146 + 0.25 Combine like terms: 3.794184146 + 0.25 = 4.044184146 x = 4.044184146 Simplifying x = 4.044184146

Subproblem 2

x + -0.25 = -3.794184146 Simplifying x + -0.25 = -3.794184146 Reorder the terms: -0.25 + x = -3.794184146 Solving -0.25 + x = -3.794184146 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -3.794184146 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -3.794184146 + 0.25 x = -3.794184146 + 0.25 Combine like terms: -3.794184146 + 0.25 = -3.544184146 x = -3.544184146 Simplifying x = -3.544184146

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.044184146, -3.544184146}

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