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D( x )
x+4 = 0
x+4 = 0
x+4 = 0
x+4 = 0 // - 4
x = -4
x in (-oo:-4) U (-4:+oo)
(2*x^2+15*x+29)/(x+4) = 0
2*x^2+15*x+29 = 0
2*x^2+15*x+29 = 0
DELTA = 15^2-(2*4*29)
DELTA = -7
DELTA < 0
1 = 0
1/(x+4) = 0
x belongs to the empty set
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