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D( p )
16-(8*p) = 0
16-(8*p) = 0
16-(8*p) = 0
16-8*p = 0
16-8*p = 0 // - 16
-8*p = -16 // : -8
p = -16/(-8)
p = 2
p in (-oo:2) U (2:+oo)
(2*p^3-(4*p^2))/(16-(8*p)) = 0
(2*p^3-4*p^2)/(16-8*p) = 0
2*p^3-4*p^2 = 0
2*p^2*(p-2) = 0
p-2 = 0 // + 2
p = 2
2*p^2*(p-2) = 0
(2*p^2*(p-2))/(16-8*p) = 0
( 2*p^2 )
2*p^2 = 0 // : 2
p^2 = 0
p = 0
( p-2 )
p-2 = 0 // + 2
p = 2
p in { 2}
p = 0
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