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x in (-oo:+oo)
((5-x)^2)/3 = 125 // - 125
((5-x)^2)/3-125 = 0
((5-x)^2)/3+(-125*3)/3 = 0
(5-x)^2-125*3 = 0
x^2-10*x-350 = 0
x^2-10*x-350 = 0
x^2-10*x-350 = 0
DELTA = (-10)^2-(-350*1*4)
DELTA = 1500
DELTA > 0
x = (1500^(1/2)+10)/(1*2) or x = (10-1500^(1/2))/(1*2)
x = (10*15^(1/2)+10)/2 or x = (10-10*15^(1/2))/2
(x-((10-10*15^(1/2))/2))*(x-((10*15^(1/2)+10)/2)) = 0
((x-((10-10*15^(1/2))/2))*(x-((10*15^(1/2)+10)/2)))/3 = 0
((x-((10-10*15^(1/2))/2))*(x-((10*15^(1/2)+10)/2)))/3 = 0 // * 3
(x-((10-10*15^(1/2))/2))*(x-((10*15^(1/2)+10)/2)) = 0
( x-((10*15^(1/2)+10)/2) )
x-((10*15^(1/2)+10)/2) = 0 // + (10*15^(1/2)+10)/2
x = (10*15^(1/2)+10)/2
( x-((10-10*15^(1/2))/2) )
x-((10-10*15^(1/2))/2) = 0 // + (10-10*15^(1/2))/2
x = (10-10*15^(1/2))/2
x in { (10*15^(1/2)+10)/2, (10-10*15^(1/2))/2 }
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