3x^2+3x-127=0

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Solution for 3x^2+3x-127=0 equation:


Simplifying
3x2 + 3x + -127 = 0

Reorder the terms:
-127 + 3x + 3x2 = 0

Solving
-127 + 3x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-42.33333333 + x + x2 = 0

Move the constant term to the right:

Add '42.33333333' to each side of the equation.
-42.33333333 + x + 42.33333333 + x2 = 0 + 42.33333333

Reorder the terms:
-42.33333333 + 42.33333333 + x + x2 = 0 + 42.33333333

Combine like terms: -42.33333333 + 42.33333333 = 0.00000000
0.00000000 + x + x2 = 0 + 42.33333333
x + x2 = 0 + 42.33333333

Combine like terms: 0 + 42.33333333 = 42.33333333
x + x2 = 42.33333333

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 = 42.33333333 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 42.33333333 + 0.25

Combine like terms: 42.33333333 + 0.25 = 42.58333333
1.25 + x2 = 42.58333333

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 42.58333333

Calculate the square root of the right side: 6.52559065

Break this problem into two subproblems by setting 
(x + 0.5) equal to 6.52559065 and -6.52559065.

Subproblem 1

x + 0.5 = 6.52559065 Simplifying x + 0.5 = 6.52559065 Reorder the terms: 0.5 + x = 6.52559065 Solving 0.5 + x = 6.52559065 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 = 6.52559065 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 6.52559065 + -0.5 x = 6.52559065 + -0.5 Combine like terms: 6.52559065 + -0.5 = 6.02559065 x = 6.02559065 Simplifying x = 6.02559065

Subproblem 2

x + 0.5 = -6.52559065 Simplifying x + 0.5 = -6.52559065 Reorder the terms: 0.5 + x = -6.52559065 Solving 0.5 + x = -6.52559065 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 = -6.52559065 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -6.52559065 + -0.5 x = -6.52559065 + -0.5 Combine like terms: -6.52559065 + -0.5 = -7.02559065 x = -7.02559065 Simplifying x = -7.02559065

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.02559065, -7.02559065}

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