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D( x )
x^2+2 = 0
x^2+2 = 0
x^2+2 = 0
1*x^2 = -2 // : 1
x^2 = -2
x in (-oo:+oo)
(5*x^4-(3*x^2)+4)/(x^2+2) = 0
(5*x^4-3*x^2+4)/(x^2+2) = 0
(5*x^4-(3*x^2)+4)/(x^2+2) = 0 // * x^2+2
5*x^4-(3*x^2)+4 = 0
5*x^4-3*x^2+4 = 0
t_1 = x^2
5*t_1^2-3*t_1^1+4 = 0
5*t_1^2-3*t_1+4 = 0
DELTA = (-3)^2-(4*4*5)
DELTA = -71
DELTA < 0
x belongs to the empty set
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