Respostas

2014-05-01T21:38:21-03:00
2014-05-01T21:42:15-03:00
x² - 5x + 6 = 0

Δ = b² - 4ac
Δ = (-5)² - 4(1)(6)
Δ = 25 - 24
Δ = 1

x = -b +-√Δ / 2a
x = -(-5) +-√1 / 2(1)
x = +5 +- 1 / 2
x¹ = +5 + 1 / 2 = 6 / 2 = 3
x² = +5 - 1 / 2 = 4 / 2 = 2

S = {x E R/ x = 3 e x = 2}
1 5 1