9x^2-123x-734=0

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Solution for 9x^2-123x-734=0 equation:


Simplifying
9x2 + -123x + -734 = 0

Reorder the terms:
-734 + -123x + 9x2 = 0

Solving
-734 + -123x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-81.55555556 + -13.66666667x + x2 = 0

Move the constant term to the right:

Add '81.55555556' to each side of the equation.
-81.55555556 + -13.66666667x + 81.55555556 + x2 = 0 + 81.55555556

Reorder the terms:
-81.55555556 + 81.55555556 + -13.66666667x + x2 = 0 + 81.55555556

Combine like terms: -81.55555556 + 81.55555556 = 0.00000000
0.00000000 + -13.66666667x + x2 = 0 + 81.55555556
-13.66666667x + x2 = 0 + 81.55555556

Combine like terms: 0 + 81.55555556 = 81.55555556
-13.66666667x + x2 = 81.55555556

The x term is -13.66666667x.  Take half its coefficient (-6.833333335).
Square it (46.69444447) and add it to both sides.

Add '46.69444447' to each side of the equation.
-13.66666667x + 46.69444447 + x2 = 81.55555556 + 46.69444447

Reorder the terms:
46.69444447 + -13.66666667x + x2 = 81.55555556 + 46.69444447

Combine like terms: 81.55555556 + 46.69444447 = 128.25000003
46.69444447 + -13.66666667x + x2 = 128.25000003

Factor a perfect square on the left side:
(x + -6.833333335)(x + -6.833333335) = 128.25000003

Calculate the square root of the right side: 11.324751654

Break this problem into two subproblems by setting 
(x + -6.833333335) equal to 11.324751654 and -11.324751654.

Subproblem 1

x + -6.833333335 = 11.324751654 Simplifying x + -6.833333335 = 11.324751654 Reorder the terms: -6.833333335 + x = 11.324751654 Solving -6.833333335 + x = 11.324751654 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.833333335' to each side of the equation. -6.833333335 + 6.833333335 + x = 11.324751654 + 6.833333335 Combine like terms: -6.833333335 + 6.833333335 = 0.000000000 0.000000000 + x = 11.324751654 + 6.833333335 x = 11.324751654 + 6.833333335 Combine like terms: 11.324751654 + 6.833333335 = 18.158084989 x = 18.158084989 Simplifying x = 18.158084989

Subproblem 2

x + -6.833333335 = -11.324751654 Simplifying x + -6.833333335 = -11.324751654 Reorder the terms: -6.833333335 + x = -11.324751654 Solving -6.833333335 + x = -11.324751654 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.833333335' to each side of the equation. -6.833333335 + 6.833333335 + x = -11.324751654 + 6.833333335 Combine like terms: -6.833333335 + 6.833333335 = 0.000000000 0.000000000 + x = -11.324751654 + 6.833333335 x = -11.324751654 + 6.833333335 Combine like terms: -11.324751654 + 6.833333335 = -4.491418319 x = -4.491418319 Simplifying x = -4.491418319

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.158084989, -4.491418319}

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