Odpowiedzi

2010-02-11T19:10:25+01:00
(x+y+1)-[(-x+y)-(y+1)-(x-1)] = x+y+1-(-x+y-y+1-x-1-x-1)=x+y+1+x+y-y+1-x--1-x-1
2010-02-11T19:10:29+01:00
(x+y+1)-[(-x+y)-(y+1)-(x-1)]= x+y+1-[-x+y-y-1-x+1]=
x+y+1+x-y+y+1+x-1=3x+y+2
Najlepsza Odpowiedź!
2010-02-11T22:38:28+01:00
(x+y+1)-[(-x+y)-(y+1)-(x-1)] =
x+y+1-[-x+y-y-1-x+1] =
x+y+1+x-y+y+1+x-1 =
3x+y+2