Question

Descompuneti in factori.
29 . x la a doua(x+1) + x(x+1)la a doua
30. x(x+1) -x-1
31. xy-x- y +1
32. 9xy +3x-3y-1
35. x la a doua + 6x +9 -y la a doua

Raspunsurile mai amanuntite ,
Va rooog

Answer 1

29).   x²(x+1)+x(x+1)²=x(x+1)(x +  x+1)=x(x+1)(2x+1) ;
30).   x(x+1)-x-1= x(x+1) - (x+1)=(x+1)(x-1) ;
31).   xy-x - y+1=x((y-1) - (y-1)=(y-1)(x-1) ;
32).   9xy+3x-3y-1=3x(3y+1) - (3y+1)=(3y+1)(3x-1) ;
35).   x²+6x+9-y² = (x-3)² - y² = [(x-3) + y][(x-3)-y]=(x+y-3)(x-y-3) ;