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descompuneti in factori ireductibili (x+1)^3-x-1 va rogg

Răspuns :

(x+1)^3-x-1 = (x+1)(x+1)^2-(x+1) =
= (x+1)[(x+1)^2-1] = (x+1)(x^2+2x+1-1) = x(x+1)(x+2)