La ex : 3 va rog ...

La Ex 3 Va Rog class=

Răspuns :

[1/2-0,(3)] :(4,5 ×2/7) -(1/7-1/2)²=
=(1/2-1/3) :(9/2 ×2/7) -[(2-7)/14]²=
=(3-2)/6 : 9/7 -(-5/14)²=
=1/6 × 7/9 -25/196=
=7/54 -25/196=
=(686-675)/5292=11/5292