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D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
5/m = (8/2)*m-6 // - (8/2)*m-6
5/m-((8/2)*m)+6 = 0
5/m-4*m+6 = 0
5*m^-1-4*m^1+6*m^0 = 0
(6*m^1-4*m^2+5*m^0)/(m^1) = 0 // * m^2
m^1*(6*m^1-4*m^2+5*m^0) = 0
m^1
6*m-4*m^2+5 = 0
6*m-4*m^2+5 = 0
DELTA = 6^2-(-4*4*5)
DELTA = 116
DELTA > 0
m = (116^(1/2)-6)/(-4*2) or m = (-116^(1/2)-6)/(-4*2)
m = (2*29^(1/2)-6)/(-8) or m = (-2*29^(1/2)-6)/(-8)
m in { (2*29^(1/2)-6)/(-8), (-2*29^(1/2)-6)/(-8)}
m in { (2*29^(1/2)-6)/(-8), (-2*29^(1/2)-6)/(-8) }
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