Respostas

  • Usuário do Brainly
2013-08-03T11:21:15-03:00
(a+b)² = a² + 2ab + b² 

(a+b)² = a² + b² + 2ab

(a+b)² = 34 + 2.15

(a+b)² = 64
4 3 4