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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
x-(24/x) < 10 // - 10
x-(24/x)-10 < 0
x-24*x^-1-10 < 0
x-24*x^-1-10 = 0
1*x^1-24*x^-1-10*x^0 = 0
(1*x^2-10*x^1-24*x^0)/(x^1) = 0 // * x^2
x^1*(1*x^2-10*x^1-24*x^0) = 0
x^1
x^2-10*x-24 = 0
x^2-10*x-24 = 0
DELTA = (-10)^2-(-24*1*4)
DELTA = 196
DELTA > 0
x = (196^(1/2)+10)/(1*2) or x = (10-196^(1/2))/(1*2)
x = 12 or x = -2
x in { -2, 12}
(x+2)*(x-12) < 0
(-oo:-2) (-2:12) (12:+oo) x+2 - + + x-12 - - +
x in (-2:0) U (0:12)
(-2:0) U (0:12)
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