Respostas

2014-07-23T15:26:58-03:00
Olá, Valcrismenezes!

x² - 7 = 0
x² = 7
x = √7
x = +-√7
1 1 1
  • Usuário do Brainly
2014-07-23T19:41:40-03:00
X² - 7 =0
x² = 7
x =√7
 e
x = - √7