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x in (-oo:+oo)
x*((3*(x-1))/9) = 243 // - 243
x*((3*(x-1))/9)-243 = 0
(3*x*(x-1))/9-243 = 0
(3*x*(x-1))/9+(-243*9)/9 = 0
3*x*(x-1)-243*9 = 0
3*x^2-3*x-2187 = 0
3*x^2-3*x-2187 = 0
3*(x^2-x-729) = 0
x^2-x-729 = 0
DELTA = (-1)^2-(-729*1*4)
DELTA = 2917
DELTA > 0
x = (2917^(1/2)+1)/(1*2) or x = (1-2917^(1/2))/(1*2)
x = (2917^(1/2)+1)/2 or x = (1-2917^(1/2))/2
3*(x-((1-2917^(1/2))/2))*(x-((2917^(1/2)+1)/2)) = 0
(3*(x-((1-2917^(1/2))/2))*(x-((2917^(1/2)+1)/2)))/9 = 0
(3*(x-((1-2917^(1/2))/2))*(x-((2917^(1/2)+1)/2)))/9 = 0 // * 9
3*(x-((1-2917^(1/2))/2))*(x-((2917^(1/2)+1)/2)) = 0
( x-((1-2917^(1/2))/2) )
x-((1-2917^(1/2))/2) = 0 // + (1-2917^(1/2))/2
x = (1-2917^(1/2))/2
( x-((2917^(1/2)+1)/2) )
x-((2917^(1/2)+1)/2) = 0 // + (2917^(1/2)+1)/2
x = (2917^(1/2)+1)/2
x in { (1-2917^(1/2))/2, (2917^(1/2)+1)/2 }
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