Respostas

2014-08-17T17:59:30-03:00
5x² - 4x + 2m = 0
 (- 4)² - 4 x 5 x 2m = 0
Δ = 16 - 20 x 2m = 0
Δ = 16 - 40m
40m = 16
m=  \frac{16}{40}
m= \frac{2}{5}
2 5 2