18x^2-216x+355=0

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Solution for 18x^2-216x+355=0 equation:


Simplifying
18x2 + -216x + 355 = 0

Reorder the terms:
355 + -216x + 18x2 = 0

Solving
355 + -216x + 18x2 = 0

Solving for variable 'x'.

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

Divide each side by '18'.
19.72222222 + -12x + x2 = 0

Move the constant term to the right:

Add '-19.72222222' to each side of the equation.
19.72222222 + -12x + -19.72222222 + x2 = 0 + -19.72222222

Reorder the terms:
19.72222222 + -19.72222222 + -12x + x2 = 0 + -19.72222222

Combine like terms: 19.72222222 + -19.72222222 = 0.00000000
0.00000000 + -12x + x2 = 0 + -19.72222222
-12x + x2 = 0 + -19.72222222

Combine like terms: 0 + -19.72222222 = -19.72222222
-12x + x2 = -19.72222222

The x term is -12x.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12x + 36 + x2 = -19.72222222 + 36

Reorder the terms:
36 + -12x + x2 = -19.72222222 + 36

Combine like terms: -19.72222222 + 36 = 16.27777778
36 + -12x + x2 = 16.27777778

Factor a perfect square on the left side:
(x + -6)(x + -6) = 16.27777778

Calculate the square root of the right side: 4.034572813

Break this problem into two subproblems by setting 
(x + -6) equal to 4.034572813 and -4.034572813.

Subproblem 1

x + -6 = 4.034572813 Simplifying x + -6 = 4.034572813 Reorder the terms: -6 + x = 4.034572813 Solving -6 + x = 4.034572813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = 4.034572813 + 6 Combine like terms: -6 + 6 = 0 0 + x = 4.034572813 + 6 x = 4.034572813 + 6 Combine like terms: 4.034572813 + 6 = 10.034572813 x = 10.034572813 Simplifying x = 10.034572813

Subproblem 2

x + -6 = -4.034572813 Simplifying x + -6 = -4.034572813 Reorder the terms: -6 + x = -4.034572813 Solving -6 + x = -4.034572813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = -4.034572813 + 6 Combine like terms: -6 + 6 = 0 0 + x = -4.034572813 + 6 x = -4.034572813 + 6 Combine like terms: -4.034572813 + 6 = 1.965427187 x = 1.965427187 Simplifying x = 1.965427187

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.034572813, 1.965427187}

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