Olá,
Seguem as respostas:
[tex] \large{ \tt a) \: \: {15}^{2} =15 \cdot15 = \green{225} }[/tex]
[tex] \large{ \tt b) \: \: {28}^{2} =28 \cdot28 = \green{784} }[/tex]
[tex] \large{ \tt c) \: \: {8}^{3} =8 \cdot8 \cdot8= \green{512} }[/tex]
[tex] \large{ \tt d) \: \: {3}^{5} =3 \cdot3 \cdot3 \cdot3 \cdot3= \green{243} }[/tex]
