Respostas

  • Usuário do Brainly
2014-08-09T12:59:49-03:00
(x+y)²=64²
x²+2xy+y²=4096

(x²+y²)+2xy=4096
34 +2xy=4096
2xy=4096-34
2xy=4062

xy=4062÷2

xy=2031