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D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
3/m-3 = (-7/8)*m+2 // - (-7/8)*m+2
3/m-((-7/8)*m)-3-2 = 0
(7/8)*m+3/m-3-2 = 0
7/8*m^1+3*m^-1-5*m^0 = 0
(7/8*m^2-5*m^1+3*m^0)/(m^1) = 0 // * m^2
m^1*(7/8*m^2-5*m^1+3*m^0) = 0
m^1
(7/8)*m^2-5*m+3 = 0
(7/8)*m^2-5*m+3 = 0
DELTA = (-5)^2-(3*4*(7/8))
DELTA = 29/2
DELTA > 0
m = ((29/2)^(1/2)+5)/(2*(7/8)) or m = (5-(29/2)^(1/2))/(2*(7/8))
m = 4/7*((29/2)^(1/2)+5) or m = 4/7*(5-(29/2)^(1/2))
m in { 4/7*(5-(29/2)^(1/2)), 4/7*((29/2)^(1/2)+5)}
m in { 4/7*(5-(29/2)^(1/2)), 4/7*((29/2)^(1/2)+5) }
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