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x in (-oo:+oo)
((x-3)^2)/3 = 81 // - 81
((x-3)^2)/3-81 = 0
((x-3)^2)/3+(-81*3)/3 = 0
(x-3)^2-81*3 = 0
x^2-6*x-234 = 0
x^2-6*x-234 = 0
x^2-6*x-234 = 0
DELTA = (-6)^2-(-234*1*4)
DELTA = 972
DELTA > 0
x = (972^(1/2)+6)/(1*2) or x = (6-972^(1/2))/(1*2)
x = (18*3^(1/2)+6)/2 or x = (6-18*3^(1/2))/2
(x-((6-18*3^(1/2))/2))*(x-((18*3^(1/2)+6)/2)) = 0
((x-((6-18*3^(1/2))/2))*(x-((18*3^(1/2)+6)/2)))/3 = 0
((x-((6-18*3^(1/2))/2))*(x-((18*3^(1/2)+6)/2)))/3 = 0 // * 3
(x-((6-18*3^(1/2))/2))*(x-((18*3^(1/2)+6)/2)) = 0
( x-((18*3^(1/2)+6)/2) )
x-((18*3^(1/2)+6)/2) = 0 // + (18*3^(1/2)+6)/2
x = (18*3^(1/2)+6)/2
( x-((6-18*3^(1/2))/2) )
x-((6-18*3^(1/2))/2) = 0 // + (6-18*3^(1/2))/2
x = (6-18*3^(1/2))/2
x in { (18*3^(1/2)+6)/2, (6-18*3^(1/2))/2 }
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