Respostas

  • Usuário do Brainly
2014-03-05T15:26:54-03:00
A
5r2 + 4r2 - 3r2
9r2 - 3r2
6r2


7/5 = 1,4

c
r121 = 11, numero nao irracional

d
(2/3 + 3 ) . 3/5
11/3 . 3/5
33/15
1 5 1