👤

3(x-1)totul la 2-5(x-1)(x+1)+2(x+1)totul la peterea 2 va rog e urgent

Răspuns :

3(x-1)²-5(x-1)(x+1)+2(x+1)²=3(x²-2x+1)-5(x²-1²)+2(x²+2x+1)=3x²-6x+3-5x²+5+2x²+4x+2=10-2x=2(5-x)