Răspuns:
a)
[tex] {2}^{31} + {2}^{33} = {2}^{31} (1 + 4) = {2}^{31} \times 5[/tex]
b)
[tex] {3}^{23} - {3}^{21} = {3}^{21} (9 - 1) = {3}^{21} \times 8[/tex]
c)
[tex] {2}^{50} - {2}^{47} = {2}^{47} (8 - 1) = {2}^{47} \times 7[/tex]
d)
[tex] {7}^{45 } + {7}^{43} = {7}^{43} (49 + 1) = {7}^{43} \times 5 \times 10[/tex]
