6x^2-19x-7=6

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Solution for 6x^2-19x-7=6 equation:


Simplifying
6x2 + -19x + -7 = 6

Reorder the terms:
-7 + -19x + 6x2 = 6

Solving
-7 + -19x + 6x2 = 6

Solving for variable 'x'.

Reorder the terms:
-7 + -6 + -19x + 6x2 = 6 + -6

Combine like terms: -7 + -6 = -13
-13 + -19x + 6x2 = 6 + -6

Combine like terms: 6 + -6 = 0
-13 + -19x + 6x2 = 0

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

Divide each side by '6'.
-2.166666667 + -3.166666667x + x2 = 0

Move the constant term to the right:

Add '2.166666667' to each side of the equation.
-2.166666667 + -3.166666667x + 2.166666667 + x2 = 0 + 2.166666667

Reorder the terms:
-2.166666667 + 2.166666667 + -3.166666667x + x2 = 0 + 2.166666667

Combine like terms: -2.166666667 + 2.166666667 = 0.000000000
0.000000000 + -3.166666667x + x2 = 0 + 2.166666667
-3.166666667x + x2 = 0 + 2.166666667

Combine like terms: 0 + 2.166666667 = 2.166666667
-3.166666667x + x2 = 2.166666667

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 = 2.166666667 + 2.506944447

Reorder the terms:
2.506944447 + -3.166666667x + x2 = 2.166666667 + 2.506944447

Combine like terms: 2.166666667 + 2.506944447 = 4.673611114
2.506944447 + -3.166666667x + x2 = 4.673611114

Factor a perfect square on the left side:
(x + -1.583333334)(x + -1.583333334) = 4.673611114

Calculate the square root of the right side: 2.161853629

Break this problem into two subproblems by setting 
(x + -1.583333334) equal to 2.161853629 and -2.161853629.

Subproblem 1

x + -1.583333334 = 2.161853629 Simplifying x + -1.583333334 = 2.161853629 Reorder the terms: -1.583333334 + x = 2.161853629 Solving -1.583333334 + x = 2.161853629 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 = 2.161853629 + 1.583333334 Combine like terms: -1.583333334 + 1.583333334 = 0.000000000 0.000000000 + x = 2.161853629 + 1.583333334 x = 2.161853629 + 1.583333334 Combine like terms: 2.161853629 + 1.583333334 = 3.745186963 x = 3.745186963 Simplifying x = 3.745186963

Subproblem 2

x + -1.583333334 = -2.161853629 Simplifying x + -1.583333334 = -2.161853629 Reorder the terms: -1.583333334 + x = -2.161853629 Solving -1.583333334 + x = -2.161853629 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 = -2.161853629 + 1.583333334 Combine like terms: -1.583333334 + 1.583333334 = 0.000000000 0.000000000 + x = -2.161853629 + 1.583333334 x = -2.161853629 + 1.583333334 Combine like terms: -2.161853629 + 1.583333334 = -0.578520295 x = -0.578520295 Simplifying x = -0.578520295

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.745186963, -0.578520295}

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