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D( x )
x^2 = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
3*x+14*x-(2*x)-(14*x)+4/(x^2)+4/(x^2)-48+48 = 0
3*x+14*x-2*x-14*x+4/(x^2)+4/(x^2)-48+48 = 0
1*x^1+8*x^-2 = 0
(1*x^3+8*x^0)/(x^2) = 0 // * x^4
x^2*(1*x^3+8*x^0) = 0
x^2
x^3+8 = 0
{ 1, -1, 2, -2, 4, -4, 8, -8 }
1
x = 1
x^3+8 = 9
1
-1
x = -1
x^3+8 = 7
-1
2
x = 2
x^3+8 = 16
2
-2
x = -2
x^3+8 = 0
-2
x+2
x^2-2*x+4
x^3+8
x+2
-x^3-2*x^2
8-2*x^2
2*x^2+4*x
4*x+8
-4*x-8
0
x^2-2*x+4 = 0
DELTA = (-2)^2-(1*4*4)
DELTA = -12
DELTA < 0
x in { -2}
x = -2
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