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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2*x-(3/x)-4 = 2/3 // - 2/3
2*x-(3/x)-(2/3)-4 = 0
2*x-3*x^-1-2/3-4 = 0
2*x^1-3*x^-1-14/3*x^0 = 0
(2*x^2-14/3*x^1-3*x^0)/(x^1) = 0 // * x^2
x^1*(2*x^2-14/3*x^1-3*x^0) = 0
x^1
2*x^2+(-14/3)*x-3 = 0
2*x^2+(-14/3)*x-3 = 0
DELTA = (-14/3)^2-(-3*2*4)
DELTA = 412/9
DELTA > 0
x = ((412/9)^(1/2)-(-14/3))/(2*2) or x = (-(-14/3)-(412/9)^(1/2))/(2*2)
x = ((412/9)^(1/2)+14/3)/4 or x = (14/3-(412/9)^(1/2))/4
x in { (14/3-(412/9)^(1/2))/4, ((412/9)^(1/2)+14/3)/4}
x in { (14/3-(412/9)^(1/2))/4, ((412/9)^(1/2)+14/3)/4 }
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