3x^2+13x-130=0

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Solution for 3x^2+13x-130=0 equation: 


Simplifying
3x2 + 13x + -130 = 0

Reorder the terms:
-130 + 13x + 3x2 = 0

Solving
-130 + 13x + 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'.
-43.33333333 + 4.333333333x + x2 = 0

Move the constant term to the right:

Add '43.33333333' to each side of the equation.
-43.33333333 + 4.333333333x + 43.33333333 + x2 = 0 + 43.33333333

Reorder the terms:
-43.33333333 + 43.33333333 + 4.333333333x + x2 = 0 + 43.33333333

Combine like terms: -43.33333333 + 43.33333333 = 0.00000000
0.00000000 + 4.333333333x + x2 = 0 + 43.33333333
4.333333333x + x2 = 0 + 43.33333333

Combine like terms: 0 + 43.33333333 = 43.33333333
4.333333333x + x2 = 43.33333333

The x term is 4.333333333x.  Take half its coefficient (2.166666667).
Square it (4.694444446) and add it to both sides.

Add '4.694444446' to each side of the equation.
4.333333333x + 4.694444446 + x2 = 43.33333333 + 4.694444446

Reorder the terms:
4.694444446 + 4.333333333x + x2 = 43.33333333 + 4.694444446

Combine like terms: 43.33333333 + 4.694444446 = 48.027777776
4.694444446 + 4.333333333x + x2 = 48.027777776

Factor a perfect square on the left side:
(x + 2.166666667)(x + 2.166666667) = 48.027777776

Calculate the square root of the right side: 6.930207629

Break this problem into two subproblems by setting 
(x + 2.166666667) equal to 6.930207629 and -6.930207629.


Subproblem 1
x + 2.166666667 = 6.930207629

Simplifying
x + 2.166666667 = 6.930207629

Reorder the terms:
2.166666667 + x = 6.930207629

Solving
2.166666667 + x = 6.930207629

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2.166666667' to each side of the equation.
2.166666667 + -2.166666667 + x = 6.930207629 + -2.166666667

Combine like terms: 2.166666667 + -2.166666667 = 0.000000000
0.000000000 + x = 6.930207629 + -2.166666667
x = 6.930207629 + -2.166666667

Combine like terms: 6.930207629 + -2.166666667 = 4.763540962
x = 4.763540962

Simplifying
x = 4.763540962


Subproblem 2
x + 2.166666667 = -6.930207629

Simplifying
x + 2.166666667 = -6.930207629

Reorder the terms:
2.166666667 + x = -6.930207629

Solving
2.166666667 + x = -6.930207629

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2.166666667' to each side of the equation.
2.166666667 + -2.166666667 + x = -6.930207629 + -2.166666667

Combine like terms: 2.166666667 + -2.166666667 = 0.000000000
0.000000000 + x = -6.930207629 + -2.166666667
x = -6.930207629 + -2.166666667

Combine like terms: -6.930207629 + -2.166666667 = -9.096874296
x = -9.096874296

Simplifying
x = -9.096874296


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {4.763540962, -9.096874296}

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