Răspunsuri

2014-05-15T18:46:22+03:00
⇒1-2[-1+8-(-1)puterea 7]:(-2)³-(-1) puterea 28=
=1-2[7+1]:(-8)-(+1)=
=1-2·8:(-8)-1=
=1-16:(-8)-1=1+2-1=2