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p in (-oo:+oo)
((p^3)/4)*((p^1)/4-((2*p^9)/4)) = 0
((p^3)/4)*((-1/2)*p^9+p/4) = 0
1/4*p^3*(1/4*p-1/2*p^9) = 0
1/4*p-1/2*p^9 = 0
1/2*p*(1/2-p^8) = 0
-1*p^8 = -1/2 // : -1
p^8 = 1/2
p^8 = 1/2 // ^ 1/8
abs(p) = (1/2)^(1/8)
p = (1/2)^(1/8) or p = -(1/2)^(1/8)
1/2*p*(p-(1/2)^(1/8))*(p+(1/2)^(1/8)) = 0
1/4*1/2*p*p^3*(p-(1/2)^(1/8))*(p+(1/2)^(1/8)) = 0
( 1/2*p )
1/2*p = 0 // : 1/2
p = 0
( 1/4*p^3 )
1/4*p^3 = 0 // : 1/4
p^3 = 0
p = 0
( p+(1/2)^(1/8) )
p+(1/2)^(1/8) = 0 // - (1/2)^(1/8)
p = -(1/2)^(1/8)
( p-(1/2)^(1/8) )
p-(1/2)^(1/8) = 0 // + (1/2)^(1/8)
p = (1/2)^(1/8)
p in { 0, 0, -(1/2)^(1/8), (1/2)^(1/8) }
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