Odpowiedzi

Najlepsza Odpowiedź!
2010-01-20T20:50:43+01:00
-6x-4y-[-(6x-2y-3x+y)-4x+12+10y]=
-6x-4y-[-6x+2y+3y-y]-4x+12+10y=
-6x-4y+6x-2y-3y+y-4x+12+10y=
=-4x+2y+12
2010-01-20T20:53:03+01:00
-6x-4y-[-(6x-2y-3x+y)-4x+12+10y]=-6x-4y-[-(3x-y)-4x+12+10y]=
=-6x-4y-[12x²-4xy+12+10y]=-6x-4y-12x²+4xy-12-10y=-12x²-6x-14y+4xy-12