3x^2-8x-92=0

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Solution for 3x^2-8x-92=0 equation:


Simplifying
3x2 + -8x + -92 = 0

Reorder the terms:
-92 + -8x + 3x2 = 0

Solving
-92 + -8x + 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'.
-30.66666667 + -2.666666667x + x2 = 0

Move the constant term to the right:

Add '30.66666667' to each side of the equation.
-30.66666667 + -2.666666667x + 30.66666667 + x2 = 0 + 30.66666667

Reorder the terms:
-30.66666667 + 30.66666667 + -2.666666667x + x2 = 0 + 30.66666667

Combine like terms: -30.66666667 + 30.66666667 = 0.00000000
0.00000000 + -2.666666667x + x2 = 0 + 30.66666667
-2.666666667x + x2 = 0 + 30.66666667

Combine like terms: 0 + 30.66666667 = 30.66666667
-2.666666667x + x2 = 30.66666667

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 = 30.66666667 + 1.777777780

Reorder the terms:
1.777777780 + -2.666666667x + x2 = 30.66666667 + 1.777777780

Combine like terms: 30.66666667 + 1.777777780 = 32.44444445
1.777777780 + -2.666666667x + x2 = 32.44444445

Factor a perfect square on the left side:
(x + -1.333333334)(x + -1.333333334) = 32.44444445

Calculate the square root of the right side: 5.696002497

Break this problem into two subproblems by setting 
(x + -1.333333334) equal to 5.696002497 and -5.696002497.

Subproblem 1

x + -1.333333334 = 5.696002497 Simplifying x + -1.333333334 = 5.696002497 Reorder the terms: -1.333333334 + x = 5.696002497 Solving -1.333333334 + x = 5.696002497 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 = 5.696002497 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = 5.696002497 + 1.333333334 x = 5.696002497 + 1.333333334 Combine like terms: 5.696002497 + 1.333333334 = 7.029335831 x = 7.029335831 Simplifying x = 7.029335831

Subproblem 2

x + -1.333333334 = -5.696002497 Simplifying x + -1.333333334 = -5.696002497 Reorder the terms: -1.333333334 + x = -5.696002497 Solving -1.333333334 + x = -5.696002497 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 = -5.696002497 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = -5.696002497 + 1.333333334 x = -5.696002497 + 1.333333334 Combine like terms: -5.696002497 + 1.333333334 = -4.362669163 x = -4.362669163 Simplifying x = -4.362669163

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.029335831, -4.362669163}

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