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x in (-oo:+oo)
(x^2)/2 = 3*x-5 // - 3*x-5
(x^2)/2-(3*x)+5 = 0
(x^2)/2-3*x+5 = 0
1/2*x^2-3*x+5 = 0
DELTA = (-3)^2-(1/2*4*5)
DELTA = -1
DELTA < 0
x belongs to the empty set
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