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D( y )
y+1 = 0
y+1 = 0
y+1 = 0
y+1 = 0 // - 1
y = -1
y in (-oo:-1) U (-1:+oo)
2/(y+1)+5*(3*y+3)+4/3 = 0
(2*3)/(3*(y+1))+(3*5*(3*y+3)*(y+1))/(3*(y+1))+(4*(y+1))/(3*(y+1)) = 0
3*5*(3*y+3)*(y+1)+4*(y+1)+2*3 = 0
45*y^2+90*y+4*y+4+51 = 0
45*y^2+94*y+55 = 0
45*y^2+94*y+55 = 0
45*y^2+94*y+55 = 0
DELTA = 94^2-(4*45*55)
DELTA = -1064
DELTA < 0
1 = 0
1/(3*(y+1)) = 0
1/(3*(y+1)) = 0 // * 3*(y+1)
1 = 0
y belongs to the empty set
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