1) E=a+4b+5c-719, daca a+6b=2b+c, iar c=120
a+6b=2b+c → a+6b=2b+120
6b-2b=120-a
4b=120-a → a+4b=120
E=a+4b+5c - 719
↓ ↓ ↓
E=120+5x120 -719
E=120+600 -719
E=720- 719 = 1 raspuns: E=1
la 2)
a) n : 121= c, [tex] c^{2} [/tex]
n=246 → 246 : 121=2 , r=4.......... 4=[tex] 2^{2} [/tex] {ADEVARAT} →→→raspuns: DA
b) aici chiar imi pare rau....nu mi-a iesit rezultatul :(
