12x^2+38x-5=0

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Solution for 12x^2+38x-5=0 equation:


Simplifying
12x2 + 38x + -5 = 0

Reorder the terms:
-5 + 38x + 12x2 = 0

Solving
-5 + 38x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
-0.4166666667 + 3.166666667x + x2 = 0

Move the constant term to the right:

Add '0.4166666667' to each side of the equation.
-0.4166666667 + 3.166666667x + 0.4166666667 + x2 = 0 + 0.4166666667

Reorder the terms:
-0.4166666667 + 0.4166666667 + 3.166666667x + x2 = 0 + 0.4166666667

Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000
0.0000000000 + 3.166666667x + x2 = 0 + 0.4166666667
3.166666667x + x2 = 0 + 0.4166666667

Combine like terms: 0 + 0.4166666667 = 0.4166666667
3.166666667x + x2 = 0.4166666667

The x term is 3.166666667x.  Take half its coefficient (1.583333334).
Square it (2.506944447) and add it to both sides.

Add '2.506944447' to each side of the equation.
3.166666667x + 2.506944447 + x2 = 0.4166666667 + 2.506944447

Reorder the terms:
2.506944447 + 3.166666667x + x2 = 0.4166666667 + 2.506944447

Combine like terms: 0.4166666667 + 2.506944447 = 2.9236111137
2.506944447 + 3.166666667x + x2 = 2.9236111137

Factor a perfect square on the left side:
(x + 1.583333334)(x + 1.583333334) = 2.9236111137

Calculate the square root of the right side: 1.709857045

Break this problem into two subproblems by setting 
(x + 1.583333334) equal to 1.709857045 and -1.709857045.

Subproblem 1

x + 1.583333334 = 1.709857045 Simplifying x + 1.583333334 = 1.709857045 Reorder the terms: 1.583333334 + x = 1.709857045 Solving 1.583333334 + x = 1.709857045 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.583333334' to each side of the equation. 1.583333334 + -1.583333334 + x = 1.709857045 + -1.583333334 Combine like terms: 1.583333334 + -1.583333334 = 0.000000000 0.000000000 + x = 1.709857045 + -1.583333334 x = 1.709857045 + -1.583333334 Combine like terms: 1.709857045 + -1.583333334 = 0.126523711 x = 0.126523711 Simplifying x = 0.126523711

Subproblem 2

x + 1.583333334 = -1.709857045 Simplifying x + 1.583333334 = -1.709857045 Reorder the terms: 1.583333334 + x = -1.709857045 Solving 1.583333334 + x = -1.709857045 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.583333334' to each side of the equation. 1.583333334 + -1.583333334 + x = -1.709857045 + -1.583333334 Combine like terms: 1.583333334 + -1.583333334 = 0.000000000 0.000000000 + x = -1.709857045 + -1.583333334 x = -1.709857045 + -1.583333334 Combine like terms: -1.709857045 + -1.583333334 = -3.293190379 x = -3.293190379 Simplifying x = -3.293190379

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.126523711, -3.293190379}

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