Respostas

2014-03-19T10:13:19-03:00
(+2)^(²)x(+2)^(-²)
(+2)^(0)x(+2)^(0)
1^(0)x1^(0)
1^(0) (resposta)
2014-03-19T10:31:00-03:00
(+2)² ÷ (+2)²
(+4) ÷ (+4) 
+1
1 5 1