Răspuns :
2x la a doua -x+4x-2-x la a doua-3x+1=
x la a doua -2x-3x-1=
xpatrat-5x-1
6xpatrat -6x+6x-6=
6x patrat-6=6(x-1)
x la a doua -2x-3x-1=
xpatrat-5x-1
6xpatrat -6x+6x-6=
6x patrat-6=6(x-1)
(x+2)(2x-1)-x(x+3)+1=
2x²-x+4x-2-x²-3x+1=
x²-1=(x-1)(x+1)
(2x+2)(3x-3)=
6x²-6x+6x-6=
6x²-6=
6(x²-1)
2x²-x+4x-2-x²-3x+1=
x²-1=(x-1)(x+1)
(2x+2)(3x-3)=
6x²-6x+6x-6=
6x²-6=
6(x²-1)