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descompuneti in factori:
(x+1) la cub - (x-2) la cub.

va rog urgent am nevoie:(:(:(


Răspuns :

(x+1)³=x³+3x²*1+3x*1²+1³
(x-2)=x³-3x²*(-2)+3x*(-2)²+(-2)³