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D( m )
2*m+4 = 0
m+2 = 0
2*m+4 = 0
2*m+4 = 0
2*m+4 = 0 // - 4
2*m = -4 // : 2
m = -4/2
m = -2
m+2 = 0
m+2 = 0
m+2 = 0 // - 2
m = -2
m in (-oo:-2) U (-2:+oo)
3/(2*m+4) = 1/(m+2)-2 // - 1/(m+2)-2
3/(2*m+4)-(1/(m+2))+2 = 0
3/(2*m+4)-(m+2)^-1+2 = 0
3/(2*m+4)-1/(m+2)+2 = 0
(3*(m+2))/((2*m+4)*(m+2))+(-1*(2*m+4))/((2*m+4)*(m+2))+(2*(2*m+4)*(m+2))/((2*m+4)*(m+2)) = 0
3*(m+2)-1*(2*m+4)+2*(2*m+4)*(m+2) = 0
4*m^2+m+16*m+2+16 = 0
4*m^2+17*m+18 = 0
4*m^2+17*m+18 = 0
4*m^2+17*m+18 = 0
DELTA = 17^2-(4*4*18)
DELTA = 1
DELTA > 0
m = (1^(1/2)-17)/(2*4) or m = (-1^(1/2)-17)/(2*4)
m = -2 or m = -9/4
(m+9/4)*(m+2) = 0
((m+9/4)*(m+2))/((2*m+4)*(m+2)) = 0
((m+9/4)*(m+2))/((2*m+4)*(m+2)) = 0 // * (2*m+4)*(m+2)
(m+9/4)*(m+2) = 0
( m+2 )
m+2 = 0 // - 2
m = -2
( m+9/4 )
m+9/4 = 0 // - 9/4
m = -9/4
m in { -2}
m = -9/4
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