Respostas

2014-08-30T20:01:35-03:00
  • Usuário do Brainly
2014-08-30T20:30:00-03:00
(3/4x + 2/5y)²9x²/16 + 12xy/20 + 4y²/25
9x²/16 +3xy/5 + 4y²/25