Respostas

  • Usuário do Brainly
2014-07-15T17:06:05-03:00
X² = 100
x = ± √100
x = ± 10

S = {- 10, 10}
2014-07-15T17:12:07-03:00
(x² = 100)
√x² = +-√100
x = +- 10
S = {10,-10}