Odpowiedzi

2009-09-23T14:39:40+02:00
A) (3x-2)(y+3)-(x-3y)=3xy+9x-2y-6
1 4 1
2009-09-23T14:42:17+02:00
(3x-2)(y+3)-(x-3y)=3xy+9x-2y-6-x+3y=3xy+8x+y-6
1 4 1
2009-09-23T15:15:13+02:00
(3x-2)(y+3)-(x-3y) = 3xy+9x-2y-6-x-3y=
= 3xy + 8x -5y -6