Respostas

2014-06-15T20:57:05-03:00
3x² - 5x = -1
3x² - 5x + 1 = 0
a = 3, b = - 5, c = 1
Δ = b² - 4ac
Δ = (-5)² - 4.3.1
Δ = 25 - 12
Δ = 13
1 5 1