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Cum se descompune 1 + x - x² - x³ ?
Am nevoie urgent.​


Răspuns :

Răspuns:

(1+x)-x^2(1+x)

(1+x)(1-x^2)=(1+x)(1+x)(1-x)=(1-x) (1+x)^2

a^2-b^2=(a+b)(a-b)