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x in (-oo:+oo)
((x-5)^2)/3 = 9 // - 9
((x-5)^2)/3-9 = 0
((x-5)^2)/3+(-9*3)/3 = 0
(x-5)^2-9*3 = 0
x^2-10*x-2 = 0
x^2-10*x-2 = 0
x^2-10*x-2 = 0
DELTA = (-10)^2-(-2*1*4)
DELTA = 108
DELTA > 0
x = (108^(1/2)+10)/(1*2) or x = (10-108^(1/2))/(1*2)
x = (6*3^(1/2)+10)/2 or x = (10-6*3^(1/2))/2
(x-((10-6*3^(1/2))/2))*(x-((6*3^(1/2)+10)/2)) = 0
((x-((10-6*3^(1/2))/2))*(x-((6*3^(1/2)+10)/2)))/3 = 0
((x-((10-6*3^(1/2))/2))*(x-((6*3^(1/2)+10)/2)))/3 = 0 // * 3
(x-((10-6*3^(1/2))/2))*(x-((6*3^(1/2)+10)/2)) = 0
( x-((10-6*3^(1/2))/2) )
x-((10-6*3^(1/2))/2) = 0 // + (10-6*3^(1/2))/2
x = (10-6*3^(1/2))/2
( x-((6*3^(1/2)+10)/2) )
x-((6*3^(1/2)+10)/2) = 0 // + (6*3^(1/2)+10)/2
x = (6*3^(1/2)+10)/2
x in { (10-6*3^(1/2))/2, (6*3^(1/2)+10)/2 }
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