Respostas

2014-04-19T16:05:44-03:00
-3x² -2x +3 = 0
Δ = b² - 4ac
Δ = (-2)² - 4(-3)(3)
Δ = 4 + 36
Δ = 40
x = -b +- √Δ / 2a
x = 2 +- 2√10 / -6
x1 = 2/-6 + 2√10 /-6 = -1/3 - √10/3 = 1/3 ( -1 - √10)
x2 = 2/-6 - 2√10 /-6 = -1/3 + √10/3 = 1/3 (√10 - 1)