6x^2-37x-21=0

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Solution for 6x^2-37x-21=0 equation:


Simplifying
6x2 + -37x + -21 = 0

Reorder the terms:
-21 + -37x + 6x2 = 0

Solving
-21 + -37x + 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'.
-3.5 + -6.166666667x + x2 = 0

Move the constant term to the right:

Add '3.5' to each side of the equation.
-3.5 + -6.166666667x + 3.5 + x2 = 0 + 3.5

Reorder the terms:
-3.5 + 3.5 + -6.166666667x + x2 = 0 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + -6.166666667x + x2 = 0 + 3.5
-6.166666667x + x2 = 0 + 3.5

Combine like terms: 0 + 3.5 = 3.5
-6.166666667x + x2 = 3.5

The x term is -6.166666667x.  Take half its coefficient (-3.083333334).
Square it (9.506944449) and add it to both sides.

Add '9.506944449' to each side of the equation.
-6.166666667x + 9.506944449 + x2 = 3.5 + 9.506944449

Reorder the terms:
9.506944449 + -6.166666667x + x2 = 3.5 + 9.506944449

Combine like terms: 3.5 + 9.506944449 = 13.006944449
9.506944449 + -6.166666667x + x2 = 13.006944449

Factor a perfect square on the left side:
(x + -3.083333334)(x + -3.083333334) = 13.006944449

Calculate the square root of the right side: 3.606514169

Break this problem into two subproblems by setting 
(x + -3.083333334) equal to 3.606514169 and -3.606514169.

Subproblem 1

x + -3.083333334 = 3.606514169 Simplifying x + -3.083333334 = 3.606514169 Reorder the terms: -3.083333334 + x = 3.606514169 Solving -3.083333334 + x = 3.606514169 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.083333334' to each side of the equation. -3.083333334 + 3.083333334 + x = 3.606514169 + 3.083333334 Combine like terms: -3.083333334 + 3.083333334 = 0.000000000 0.000000000 + x = 3.606514169 + 3.083333334 x = 3.606514169 + 3.083333334 Combine like terms: 3.606514169 + 3.083333334 = 6.689847503 x = 6.689847503 Simplifying x = 6.689847503

Subproblem 2

x + -3.083333334 = -3.606514169 Simplifying x + -3.083333334 = -3.606514169 Reorder the terms: -3.083333334 + x = -3.606514169 Solving -3.083333334 + x = -3.606514169 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.083333334' to each side of the equation. -3.083333334 + 3.083333334 + x = -3.606514169 + 3.083333334 Combine like terms: -3.083333334 + 3.083333334 = 0.000000000 0.000000000 + x = -3.606514169 + 3.083333334 x = -3.606514169 + 3.083333334 Combine like terms: -3.606514169 + 3.083333334 = -0.523180835 x = -0.523180835 Simplifying x = -0.523180835

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.689847503, -0.523180835}

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