12x^2-120x+209=0

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Solution for 12x^2-120x+209=0 equation:


Simplifying
12x2 + -120x + 209 = 0

Reorder the terms:
209 + -120x + 12x2 = 0

Solving
209 + -120x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
17.41666667 + -10x + x2 = 0

Move the constant term to the right:

Add '-17.41666667' to each side of the equation.
17.41666667 + -10x + -17.41666667 + x2 = 0 + -17.41666667

Reorder the terms:
17.41666667 + -17.41666667 + -10x + x2 = 0 + -17.41666667

Combine like terms: 17.41666667 + -17.41666667 = 0.00000000
0.00000000 + -10x + x2 = 0 + -17.41666667
-10x + x2 = 0 + -17.41666667

Combine like terms: 0 + -17.41666667 = -17.41666667
-10x + x2 = -17.41666667

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = -17.41666667 + 25

Reorder the terms:
25 + -10x + x2 = -17.41666667 + 25

Combine like terms: -17.41666667 + 25 = 7.58333333
25 + -10x + x2 = 7.58333333

Factor a perfect square on the left side:
(x + -5)(x + -5) = 7.58333333

Calculate the square root of the right side: 2.753785273

Break this problem into two subproblems by setting 
(x + -5) equal to 2.753785273 and -2.753785273.

Subproblem 1

x + -5 = 2.753785273 Simplifying x + -5 = 2.753785273 Reorder the terms: -5 + x = 2.753785273 Solving -5 + x = 2.753785273 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 2.753785273 + 5 Combine like terms: -5 + 5 = 0 0 + x = 2.753785273 + 5 x = 2.753785273 + 5 Combine like terms: 2.753785273 + 5 = 7.753785273 x = 7.753785273 Simplifying x = 7.753785273

Subproblem 2

x + -5 = -2.753785273 Simplifying x + -5 = -2.753785273 Reorder the terms: -5 + x = -2.753785273 Solving -5 + x = -2.753785273 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -2.753785273 + 5 Combine like terms: -5 + 5 = 0 0 + x = -2.753785273 + 5 x = -2.753785273 + 5 Combine like terms: -2.753785273 + 5 = 2.246214727 x = 2.246214727 Simplifying x = 2.246214727

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.753785273, 2.246214727}

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