-6x^2=-13x-12

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Solution for -6x^2=-13x-12 equation:


Simplifying
-6x2 = -13x + -12

Reorder the terms:
-6x2 = -12 + -13x

Solving
-6x2 = -12 + -13x

Solving for variable 'x'.

Reorder the terms:
12 + 13x + -6x2 = -12 + -13x + 12 + 13x

Reorder the terms:
12 + 13x + -6x2 = -12 + 12 + -13x + 13x

Combine like terms: -12 + 12 = 0
12 + 13x + -6x2 = 0 + -13x + 13x
12 + 13x + -6x2 = -13x + 13x

Combine like terms: -13x + 13x = 0
12 + 13x + -6x2 = 0

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

Divide each side by '-6'.
-2 + -2.166666667x + x2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -2.166666667x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + -2.166666667x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -2.166666667x + x2 = 0 + 2
-2.166666667x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
-2.166666667x + x2 = 2

The x term is -2.166666667x.  Take half its coefficient (-1.083333334).
Square it (1.173611113) and add it to both sides.

Add '1.173611113' to each side of the equation.
-2.166666667x + 1.173611113 + x2 = 2 + 1.173611113

Reorder the terms:
1.173611113 + -2.166666667x + x2 = 2 + 1.173611113

Combine like terms: 2 + 1.173611113 = 3.173611113
1.173611113 + -2.166666667x + x2 = 3.173611113

Factor a perfect square on the left side:
(x + -1.083333334)(x + -1.083333334) = 3.173611113

Calculate the square root of the right side: 1.781463194

Break this problem into two subproblems by setting 
(x + -1.083333334) equal to 1.781463194 and -1.781463194.

Subproblem 1

x + -1.083333334 = 1.781463194 Simplifying x + -1.083333334 = 1.781463194 Reorder the terms: -1.083333334 + x = 1.781463194 Solving -1.083333334 + x = 1.781463194 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.083333334' to each side of the equation. -1.083333334 + 1.083333334 + x = 1.781463194 + 1.083333334 Combine like terms: -1.083333334 + 1.083333334 = 0.000000000 0.000000000 + x = 1.781463194 + 1.083333334 x = 1.781463194 + 1.083333334 Combine like terms: 1.781463194 + 1.083333334 = 2.864796528 x = 2.864796528 Simplifying x = 2.864796528

Subproblem 2

x + -1.083333334 = -1.781463194 Simplifying x + -1.083333334 = -1.781463194 Reorder the terms: -1.083333334 + x = -1.781463194 Solving -1.083333334 + x = -1.781463194 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.083333334' to each side of the equation. -1.083333334 + 1.083333334 + x = -1.781463194 + 1.083333334 Combine like terms: -1.083333334 + 1.083333334 = 0.000000000 0.000000000 + x = -1.781463194 + 1.083333334 x = -1.781463194 + 1.083333334 Combine like terms: -1.781463194 + 1.083333334 = -0.69812986 x = -0.69812986 Simplifying x = -0.69812986

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.864796528, -0.69812986}

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