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x in (-oo:+oo)
(x-5)^2 = 12/25 // - 12/25
(x-5)^2-(12/25) = 0
(x-5)^2-12/25 = 0
(25*(x-5)^2)/25-12/25 = 0
25*(x-5)^2-12 = 0
25*x^2-250*x+613 = 0
25*x^2-250*x+613 = 0
25*x^2-250*x+613 = 0
DELTA = (-250)^2-(4*25*613)
DELTA = 1200
DELTA > 0
x = (1200^(1/2)+250)/(2*25) or x = (250-1200^(1/2))/(2*25)
x = (20*3^(1/2)+250)/50 or x = (250-20*3^(1/2))/50
(x-((250-20*3^(1/2))/50))*(x-((20*3^(1/2)+250)/50)) = 0
((x-((250-20*3^(1/2))/50))*(x-((20*3^(1/2)+250)/50)))/25 = 0
((x-((250-20*3^(1/2))/50))*(x-((20*3^(1/2)+250)/50)))/25 = 0 // * 25
(x-((250-20*3^(1/2))/50))*(x-((20*3^(1/2)+250)/50)) = 0
( x-((20*3^(1/2)+250)/50) )
x-((20*3^(1/2)+250)/50) = 0 // + (20*3^(1/2)+250)/50
x = (20*3^(1/2)+250)/50
( x-((250-20*3^(1/2))/50) )
x-((250-20*3^(1/2))/50) = 0 // + (250-20*3^(1/2))/50
x = (250-20*3^(1/2))/50
x in { (20*3^(1/2)+250)/50, (250-20*3^(1/2))/50 }
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