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(x+2)totul la 2 +(x-2)(x+2)-x ori (2x-1) Va rog am nevoie urgent

Răspuns :

(x+2)² +(x-2)(x+2) -x(2x-1) = x² +4x +4 +(x²-4) -2x² +x =x²+4x+4+x²-4-2x²+x= 5x