Respostas

  • Usuário do Brainly
2014-06-13T17:20:54-03:00
9x² - 4x = 0
x . (9x - 4) = 0
x = 0
9x - 4 = 0
9x = 4
x = 4/9
2014-06-13T17:21:59-03:00
9x²-4=0=x
  x1=0
  x2:9x-4=0 de onde 9x=4
  x=4/9