(2x+5)(x-1)-3(x²+2x-3)+x(x-2)=
9x⁴y⁴z⁴:(xyz²)²+(-12x²y³z⁴):(-3yz⁴)+(3x²y²z-6x²y²z):(3z)=
Daca 3x-y=5 , calculati a= (3x-y)+(3x-y)²+...+(3x-y)¹⁰=
9x⁴y⁴z⁴:(xyz²)²+(-12x²y³z⁴):(-3yz⁴)+(3x²y²z-6x²y²z):(3z)=
Daca 3x-y=5 , calculati a= (3x-y)+(3x-y)²+...+(3x-y)¹⁰=