3x^2-19x-92=0

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Solution for 3x^2-19x-92=0 equation:


Simplifying
3x2 + -19x + -92 = 0

Reorder the terms:
-92 + -19x + 3x2 = 0

Solving
-92 + -19x + 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 + -6.333333333x + x2 = 0

Move the constant term to the right:

Add '30.66666667' to each side of the equation.
-30.66666667 + -6.333333333x + 30.66666667 + x2 = 0 + 30.66666667

Reorder the terms:
-30.66666667 + 30.66666667 + -6.333333333x + x2 = 0 + 30.66666667

Combine like terms: -30.66666667 + 30.66666667 = 0.00000000
0.00000000 + -6.333333333x + x2 = 0 + 30.66666667
-6.333333333x + x2 = 0 + 30.66666667

Combine like terms: 0 + 30.66666667 = 30.66666667
-6.333333333x + x2 = 30.66666667

The x term is -6.333333333x.  Take half its coefficient (-3.166666667).
Square it (10.02777778) and add it to both sides.

Add '10.02777778' to each side of the equation.
-6.333333333x + 10.02777778 + x2 = 30.66666667 + 10.02777778

Reorder the terms:
10.02777778 + -6.333333333x + x2 = 30.66666667 + 10.02777778

Combine like terms: 30.66666667 + 10.02777778 = 40.69444445
10.02777778 + -6.333333333x + x2 = 40.69444445

Factor a perfect square on the left side:
(x + -3.166666667)(x + -3.166666667) = 40.69444445

Calculate the square root of the right side: 6.379219737

Break this problem into two subproblems by setting 
(x + -3.166666667) equal to 6.379219737 and -6.379219737.

Subproblem 1

x + -3.166666667 = 6.379219737 Simplifying x + -3.166666667 = 6.379219737 Reorder the terms: -3.166666667 + x = 6.379219737 Solving -3.166666667 + x = 6.379219737 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.166666667' to each side of the equation. -3.166666667 + 3.166666667 + x = 6.379219737 + 3.166666667 Combine like terms: -3.166666667 + 3.166666667 = 0.000000000 0.000000000 + x = 6.379219737 + 3.166666667 x = 6.379219737 + 3.166666667 Combine like terms: 6.379219737 + 3.166666667 = 9.545886404 x = 9.545886404 Simplifying x = 9.545886404

Subproblem 2

x + -3.166666667 = -6.379219737 Simplifying x + -3.166666667 = -6.379219737 Reorder the terms: -3.166666667 + x = -6.379219737 Solving -3.166666667 + x = -6.379219737 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.166666667' to each side of the equation. -3.166666667 + 3.166666667 + x = -6.379219737 + 3.166666667 Combine like terms: -3.166666667 + 3.166666667 = 0.000000000 0.000000000 + x = -6.379219737 + 3.166666667 x = -6.379219737 + 3.166666667 Combine like terms: -6.379219737 + 3.166666667 = -3.21255307 x = -3.21255307 Simplifying x = -3.21255307

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.545886404, -3.21255307}

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