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x in (-oo:+oo)
((x-4)^2)/3 = 81 // - 81
((x-4)^2)/3-81 = 0
((x-4)^2)/3+(-81*3)/3 = 0
(x-4)^2-81*3 = 0
x^2-8*x-227 = 0
x^2-8*x-227 = 0
x^2-8*x-227 = 0
DELTA = (-8)^2-(-227*1*4)
DELTA = 972
DELTA > 0
x = (972^(1/2)+8)/(1*2) or x = (8-972^(1/2))/(1*2)
x = (18*3^(1/2)+8)/2 or x = (8-18*3^(1/2))/2
(x-((8-18*3^(1/2))/2))*(x-((18*3^(1/2)+8)/2)) = 0
((x-((8-18*3^(1/2))/2))*(x-((18*3^(1/2)+8)/2)))/3 = 0
((x-((8-18*3^(1/2))/2))*(x-((18*3^(1/2)+8)/2)))/3 = 0 // * 3
(x-((8-18*3^(1/2))/2))*(x-((18*3^(1/2)+8)/2)) = 0
( x-((18*3^(1/2)+8)/2) )
x-((18*3^(1/2)+8)/2) = 0 // + (18*3^(1/2)+8)/2
x = (18*3^(1/2)+8)/2
( x-((8-18*3^(1/2))/2) )
x-((8-18*3^(1/2))/2) = 0 // + (8-18*3^(1/2))/2
x = (8-18*3^(1/2))/2
x in { (18*3^(1/2)+8)/2, (8-18*3^(1/2))/2 }
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