Respostas

2014-02-26T00:50:42-03:00
5x^2=15 -> x^2=15/5 -> x^2=3 -> x=√3
6 4 6
2014-02-26T01:08:06-03:00
Olá

  5x²-15=0
   5x
²=15
    x²=3
    x=+-√3
11 4 11