6x^2-23x-9=0

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Solution for 6x^2-23x-9=0 equation:


Simplifying
6x2 + -23x + -9 = 0

Reorder the terms:
-9 + -23x + 6x2 = 0

Solving
-9 + -23x + 6x2 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-1.5 + -3.833333333x + x2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -3.833333333x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -3.833333333x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -3.833333333x + x2 = 0 + 1.5
-3.833333333x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-3.833333333x + x2 = 1.5

The x term is -3.833333333x.  Take half its coefficient (-1.916666667).
Square it (3.673611112) and add it to both sides.

Add '3.673611112' to each side of the equation.
-3.833333333x + 3.673611112 + x2 = 1.5 + 3.673611112

Reorder the terms:
3.673611112 + -3.833333333x + x2 = 1.5 + 3.673611112

Combine like terms: 1.5 + 3.673611112 = 5.173611112
3.673611112 + -3.833333333x + x2 = 5.173611112

Factor a perfect square on the left side:
(x + -1.916666667)(x + -1.916666667) = 5.173611112

Calculate the square root of the right side: 2.274557344

Break this problem into two subproblems by setting 
(x + -1.916666667) equal to 2.274557344 and -2.274557344.

Subproblem 1

x + -1.916666667 = 2.274557344 Simplifying x + -1.916666667 = 2.274557344 Reorder the terms: -1.916666667 + x = 2.274557344 Solving -1.916666667 + x = 2.274557344 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.916666667' to each side of the equation. -1.916666667 + 1.916666667 + x = 2.274557344 + 1.916666667 Combine like terms: -1.916666667 + 1.916666667 = 0.000000000 0.000000000 + x = 2.274557344 + 1.916666667 x = 2.274557344 + 1.916666667 Combine like terms: 2.274557344 + 1.916666667 = 4.191224011 x = 4.191224011 Simplifying x = 4.191224011

Subproblem 2

x + -1.916666667 = -2.274557344 Simplifying x + -1.916666667 = -2.274557344 Reorder the terms: -1.916666667 + x = -2.274557344 Solving -1.916666667 + x = -2.274557344 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.916666667' to each side of the equation. -1.916666667 + 1.916666667 + x = -2.274557344 + 1.916666667 Combine like terms: -1.916666667 + 1.916666667 = 0.000000000 0.000000000 + x = -2.274557344 + 1.916666667 x = -2.274557344 + 1.916666667 Combine like terms: -2.274557344 + 1.916666667 = -0.357890677 x = -0.357890677 Simplifying x = -0.357890677

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.191224011, -0.357890677}

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