203) 27*x^6 - 9*x^4 + x^2 - 1/27 == 27*(x^6 - x^4/3 + x^2/27 - 1/729) = 27*(x^2 - 1/9)^3-----------------------------205) 8*x^9 + 12*x^6 + 9*x^3 + 1 == 8*(x^9 + 3*x^6/2 + 9*x^3/8 + 1/8)
@exprof grazie
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