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D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
m-(3/m)-(m/m)+2/3+2 = 0
m-3*m^-1+2/3-1+2 = 0
1*m^1-3*m^-1+5/3*m^0 = 0
(1*m^2+5/3*m^1-3*m^0)/(m^1) = 0 // * m^2
m^1*(1*m^2+5/3*m^1-3*m^0) = 0
m^1
m^2+(5/3)*m-3 = 0
m^2+(5/3)*m-3 = 0
DELTA = (5/3)^2-(-3*1*4)
DELTA = 133/9
DELTA > 0
m = ((133/9)^(1/2)-(5/3))/(1*2) or m = (-(5/3)-(133/9)^(1/2))/(1*2)
m = ((133/9)^(1/2)-5/3)/2 or m = (-((133/9)^(1/2)+5/3))/2
m in { (-((133/9)^(1/2)+5/3))/2, ((133/9)^(1/2)-5/3)/2}
m in { (-((133/9)^(1/2)+5/3))/2, ((133/9)^(1/2)-5/3)/2 }
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