Question

calculati a)x-x-(-x)-[-(-x)] , b)y-{y+(-y-1)]}

Answer 1

a)=>x-x+x-(+x)=>x-x+x-x=>0 b)=>y-(y-y-1)=>y-y+y+1=>y+1

Answer 2

a)x-x+x-(+x)=0+x-x=x-x=0
b)y-(y-y-1)=y-(0-1)=y-(-1)=y+1
trebuie doar sa inmultesti **semnele**
de exemplu 5-(+2)=5-2=3
COROANA??