Răspunsuri

2014-04-26T09:34:17+03:00
X³-4x²+4x=x.(x²-4x+4)=x.(x-2)²
x²(X²-1)+2(x-1)=x²(x-1)(x+1)+2(x-1)=(x-1)[x²(x+1)+2]=(x-1)(x³+x²+2)