108=x(3x-41)

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Solution for 108=x(3x-41) equation:


Simplifying
108 = x(3x + -41)

Reorder the terms:
108 = x(-41 + 3x)
108 = (-41 * x + 3x * x)
108 = (-41x + 3x2)

Solving
108 = -41x + 3x2

Solving for variable 'x'.

Reorder the terms:
108 + 41x + -3x2 = -41x + 41x + 3x2 + -3x2

Combine like terms: -41x + 41x = 0
108 + 41x + -3x2 = 0 + 3x2 + -3x2
108 + 41x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
108 + 41x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-36 + -13.66666667x + x2 = 0

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + -13.66666667x + 36 + x2 = 0 + 36

Reorder the terms:
-36 + 36 + -13.66666667x + x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + -13.66666667x + x2 = 0 + 36
-13.66666667x + x2 = 0 + 36

Combine like terms: 0 + 36 = 36
-13.66666667x + x2 = 36

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 = 36 + 46.69444447

Reorder the terms:
46.69444447 + -13.66666667x + x2 = 36 + 46.69444447

Combine like terms: 36 + 46.69444447 = 82.69444447
46.69444447 + -13.66666667x + x2 = 82.69444447

Factor a perfect square on the left side:
(x + -6.833333335)(x + -6.833333335) = 82.69444447

Calculate the square root of the right side: 9.093648579

Break this problem into two subproblems by setting 
(x + -6.833333335) equal to 9.093648579 and -9.093648579.

Subproblem 1

x + -6.833333335 = 9.093648579 Simplifying x + -6.833333335 = 9.093648579 Reorder the terms: -6.833333335 + x = 9.093648579 Solving -6.833333335 + x = 9.093648579 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 = 9.093648579 + 6.833333335 Combine like terms: -6.833333335 + 6.833333335 = 0.000000000 0.000000000 + x = 9.093648579 + 6.833333335 x = 9.093648579 + 6.833333335 Combine like terms: 9.093648579 + 6.833333335 = 15.926981914 x = 15.926981914 Simplifying x = 15.926981914

Subproblem 2

x + -6.833333335 = -9.093648579 Simplifying x + -6.833333335 = -9.093648579 Reorder the terms: -6.833333335 + x = -9.093648579 Solving -6.833333335 + x = -9.093648579 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 = -9.093648579 + 6.833333335 Combine like terms: -6.833333335 + 6.833333335 = 0.000000000 0.000000000 + x = -9.093648579 + 6.833333335 x = -9.093648579 + 6.833333335 Combine like terms: -9.093648579 + 6.833333335 = -2.260315244 x = -2.260315244 Simplifying x = -2.260315244

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.926981914, -2.260315244}

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