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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
5/x = 96*x // - 96*x
5/x-(96*x) = 0
5/x-96*x = 0
5*x^-1-96*x^1 = 0
(5*x^0-96*x^2)/(x^1) = 0 // * x^2
x^1*(5*x^0-96*x^2) = 0
x^1
5-96*x^2 = 0
5-96*x^2 = 0
DELTA = 0^2-(-96*4*5)
DELTA = 1920
DELTA > 0
x = (1920^(1/2)+0)/(-96*2) or x = (0-1920^(1/2))/(-96*2)
x = (-30^(1/2))/24 or x = (1*30^(1/2))/24
x in { (-30^(1/2))/24, (1*30^(1/2))/24}
x in { (-30^(1/2))/24, (1*30^(1/2))/24 }
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