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m in (-oo:+oo)
75*m^2-((3/25)*m)-5 = 0
75*m^2+(-3/25)*m-5 = 0
75*m^2-3/25*m-5 = 0
DELTA = (-3/25)^2-(-5*4*75)
DELTA = 937509/625
DELTA > 0
m = ((937509/625)^(1/2)+3/25)/(2*75) or m = (3/25-(937509/625)^(1/2))/(2*75)
m = ((937509/625)^(1/2)+3/25)/150 or m = (3/25-(937509/625)^(1/2))/150
m in { (3/25-(937509/625)^(1/2))/150, ((937509/625)^(1/2)+3/25)/150 }
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