Question

1)Efectuati :
a)(-34/7)·(-21/17)=
b)12·[1/4+(9/26-2/13):5/13]+(-1/2)

2)Calculati a²+b²/a²-b²= daca:
a) a=√5 si b=√3
b)a=2√3 si b=√7
c) a/b=√5/√7

Answer 1

Daca nu se vede prea bine da-i zoom. Sper ca te-am ajutat