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D( p )
p = 0
p = 0
p = 0
p in (-oo:0) U (0:+oo)
8/p = 12*p-3 // - 12*p-3
8/p-(12*p)+3 = 0
8/p-12*p+3 = 0
8*p^-1-12*p^1+3*p^0 = 0
(3*p^1-12*p^2+8*p^0)/(p^1) = 0 // * p^2
p^1*(3*p^1-12*p^2+8*p^0) = 0
p^1
3*p-12*p^2+8 = 0
3*p-12*p^2+8 = 0
DELTA = 3^2-(-12*4*8)
DELTA = 393
DELTA > 0
p = (393^(1/2)-3)/(-12*2) or p = (-393^(1/2)-3)/(-12*2)
p = (393^(1/2)-3)/(-24) or p = (393^(1/2)+3)/24
p in { (393^(1/2)-3)/(-24), (393^(1/2)+3)/24}
p in { (393^(1/2)-3)/(-24), (393^(1/2)+3)/24 }
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