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D( m )
m^2+5*m = 0
m = 0
m^2+5*m = 0
m^2+5*m = 0
m^2+5*m = 0
DELTA = 5^2-(0*1*4)
DELTA = 25
DELTA > 0
m = (25^(1/2)-5)/(1*2) or m = (-25^(1/2)-5)/(1*2)
m = 0 or m = -5
m = 0
m = 0
m in (-oo:-5) U (-5:0) U (0:+oo)
6/m+7/m+5 = (3*m+5)/(m^2+5*m) // - (3*m+5)/(m^2+5*m)
6/m-((3*m+5)/(m^2+5*m))+7/m+5 = 0
(-1*(3*m+5))/(m^2+5*m)+6/m+7/m+5 = 0
m^2+5*m = 0
m^2+5*m = 0
m*(m+5) = 0
m+5 = 0 // - 5
m = -5
m*(m+5) = 0
(-1*(3*m+5))/(m*(m+5))+6/m+7/m+5 = 0
(-1*(3*m+5))/(m*(m+5))+(6*(m+5))/(m*(m+5))+(7*(m+5))/(m*(m+5))+(5*m*(m+5))/(m*(m+5)) = 0
6*(m+5)-1*(3*m+5)+7*(m+5)+5*m*(m+5) = 0
5*m^2+3*m+7*m+25*m+25+35 = 0
5*m^2+10*m+25*m+60 = 0
5*m^2+35*m+60 = 0
5*m^2+35*m+60 = 0
5*(m^2+7*m+12) = 0
m^2+7*m+12 = 0
DELTA = 7^2-(1*4*12)
DELTA = 1
DELTA > 0
m = (1^(1/2)-7)/(1*2) or m = (-1^(1/2)-7)/(1*2)
m = -3 or m = -4
5*(m+4)*(m+3) = 0
(5*(m+4)*(m+3))/(m*(m+5)) = 0
(5*(m+4)*(m+3))/(m*(m+5)) = 0 // * m*(m+5)
5*(m+4)*(m+3) = 0
( m+3 )
m+3 = 0 // - 3
m = -3
( m+4 )
m+4 = 0 // - 4
m = -4
m in { -3, -4 }
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