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D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
10/m+3/2 = m/10 // - m/10
10/m-(m/10)+3/2 = 0
10*m^-1-1/10*m^1+3/2*m^0 = 0
(3/2*m^1-1/10*m^2+10*m^0)/(m^1) = 0 // * m^2
m^1*(3/2*m^1-1/10*m^2+10*m^0) = 0
m^1
(-1/10)*m^2+(3/2)*m+10 = 0
(-1/10)*m^2+(3/2)*m+10 = 0
DELTA = (3/2)^2-(4*10*(-1/10))
DELTA = 25/4
DELTA > 0
m = ((25/4)^(1/2)-(3/2))/(2*(-1/10)) or m = (-(3/2)-(25/4)^(1/2))/(2*(-1/10))
m = -5 or m = 20
m in { -5, 20}
m in { -5, 20 }
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