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u in (-oo:+oo)
u^2-(3*u^2)-(10*u)+24/48 = 0
u^2-3*u^2-10*u+24/48 = 0
1/2-2*u^2-10*u = 0
DELTA = (-10)^2-(-2*1/2*4)
DELTA = 104
DELTA > 0
u = (104^(1/2)+10)/(-2*2) or u = (10-104^(1/2))/(-2*2)
u = (2*26^(1/2)+10)/(-4) or u = (10-2*26^(1/2))/(-4)
u in { (2*26^(1/2)+10)/(-4), (10-2*26^(1/2))/(-4) }
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