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D( x )
x+2 = 0
x+2 = 0
x+2 = 0
x+2 = 0 // - 2
x = -2
x in (-oo:-2) U (-2:+oo)
(3*x^3+9*x^2+8*x+4)/(x+2) = 0
3*x^3+9*x^2+8*x+4 = 0
3*x^3+9*x^2+8*x+4 = 0
{ 1, -1, 2, -2, 4, -4 }
1
x = 1
3*x^3+9*x^2+8*x+4 = 24
1
-1
x = -1
3*x^3+9*x^2+8*x+4 = 2
-1
2
x = 2
3*x^3+9*x^2+8*x+4 = 80
2
-2
x = -2
3*x^3+9*x^2+8*x+4 = 0
-2
x+2
3*x^2+3*x+2
3*x^3+9*x^2+8*x+4
x+2
-3*x^3-6*x^2
3*x^2+8*x+4
-3*x^2-6*x
2*x+4
-2*x-4
0
3*x^2+3*x+2 = 0
DELTA = 3^2-(2*3*4)
DELTA = -15
DELTA < 0
x in { -2}
x+2 = 0
1 = 0
x belongs to the empty set
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