8/m-5+21/3m

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Solution for 8/m-5+21/3m equation: 


D( m )

m = 0

m = 0

m = 0

m in (-oo:0) U (0:+oo)

(21/3)*m+8/m-5 = 0

7*m^1+8*m^-1-5*m^0 = 0

(7*m^2-5*m^1+8*m^0)/(m^1) = 0 // * m^2

m^1*(7*m^2-5*m^1+8*m^0) = 0

m^1

7*m^2-5*m+8 = 0

7*m^2-5*m+8 = 0

DELTA = (-5)^2-(4*7*8)

DELTA = -199

DELTA < 0

m in { } 

m belongs to the empty set

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