Respostas

2014-02-22T10:15:43-03:00
Aplicando bhaskara => delta = 8^2 - 4(2)(7) = 64 - 56 = 8
x = 8 +- √8 / 4
x = 8 +- 2√2 / 4
x = 4 +- 
√2 / 2