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2(X+1) totul la 2 -3(x-2)(x+2)+5x(x-3)-(3x-1) totul la 2 calculat este:

Răspuns :

2(x+1)²-3(x-2)(x+2)+5x(x-3)-(3x-1)²=
2(x²+2x+1)-3(x²-4)+5x²-15x-(9x²-6x+1)=
2x²+4x+2-3x²+12+5x²-15x-9x²+6x-1=
-5x²-5x-13