0=6x^2-16x-9

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Solution for 0=6x^2-16x-9 equation:


Simplifying
0 = 6x2 + -16x + -9

Reorder the terms:
0 = -9 + -16x + 6x2

Solving
0 = -9 + -16x + 6x2

Solving for variable 'x'.

Combine like terms: 0 + 9 = 9
9 + 16x + -6x2 = -9 + -16x + 6x2 + 9 + 16x + -6x2

Reorder the terms:
9 + 16x + -6x2 = -9 + 9 + -16x + 16x + 6x2 + -6x2

Combine like terms: -9 + 9 = 0
9 + 16x + -6x2 = 0 + -16x + 16x + 6x2 + -6x2
9 + 16x + -6x2 = -16x + 16x + 6x2 + -6x2

Combine like terms: -16x + 16x = 0
9 + 16x + -6x2 = 0 + 6x2 + -6x2
9 + 16x + -6x2 = 6x2 + -6x2

Combine like terms: 6x2 + -6x2 = 0
9 + 16x + -6x2 = 0

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

Divide each side by '-6'.
-1.5 + -2.666666667x + x2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -2.666666667x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -2.666666667x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -2.666666667x + x2 = 0 + 1.5
-2.666666667x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-2.666666667x + x2 = 1.5

The x term is -2.666666667x.  Take half its coefficient (-1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
-2.666666667x + 1.777777780 + x2 = 1.5 + 1.777777780

Reorder the terms:
1.777777780 + -2.666666667x + x2 = 1.5 + 1.777777780

Combine like terms: 1.5 + 1.777777780 = 3.27777778
1.777777780 + -2.666666667x + x2 = 3.27777778

Factor a perfect square on the left side:
(x + -1.333333334)(x + -1.333333334) = 3.27777778

Calculate the square root of the right side: 1.810463416

Break this problem into two subproblems by setting 
(x + -1.333333334) equal to 1.810463416 and -1.810463416.

Subproblem 1

x + -1.333333334 = 1.810463416 Simplifying x + -1.333333334 = 1.810463416 Reorder the terms: -1.333333334 + x = 1.810463416 Solving -1.333333334 + x = 1.810463416 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = 1.810463416 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = 1.810463416 + 1.333333334 x = 1.810463416 + 1.333333334 Combine like terms: 1.810463416 + 1.333333334 = 3.14379675 x = 3.14379675 Simplifying x = 3.14379675

Subproblem 2

x + -1.333333334 = -1.810463416 Simplifying x + -1.333333334 = -1.810463416 Reorder the terms: -1.333333334 + x = -1.810463416 Solving -1.333333334 + x = -1.810463416 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = -1.810463416 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = -1.810463416 + 1.333333334 x = -1.810463416 + 1.333333334 Combine like terms: -1.810463416 + 1.333333334 = -0.477130082 x = -0.477130082 Simplifying x = -0.477130082

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.14379675, -0.477130082}

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