Scoateti factor comun
4x+4y-4z=4(x+y-z)
18x³y²-24x²y³+6x²y² =6x²y²(3x-4y+1)
Restrangeti
x²+6x+9=(x+3)²
49x²-14x+1=(7x-1)²
Descompuneti in factori:
(x+1)²-1 =
=(x+1-1)(x+1+1)=
=x(x+2)
9(2x+1)²-25x² =
=[3(2x+1)+5x][3(2x+1)-5x]=
=(6x+3+5x)(6x+3-5x)=
=(11x+3)(x+3)