Respostas

2014-05-16T13:21:18-03:00
2x²- 1 =0 temos a=2,b = 0, c = -1
2x² = 1 isolando x²
x² = 1
       2
x = +1
          2
s= (+√1 , -√1 )
          2      2
1 2 1
2014-05-16T13:23:25-03:00
Use Baskara

x = (-b =+-√b²-4ac) ÷ 2a

x = 0 +- √0²-4.2.(-1)

x= (0 +-√8) ÷ 4

Fatora o √8 = 2√2

x= +- 2√2 ÷4

x1= √2/2
x2= -√2/2