Respostas

2013-11-27T22:57:38-02:00
Fómula:

Δ = b² -4ac
Δ = 3² -4 *2 * (-2)
Δ = 9 + 16
Δ = 25
x' = (-b + √∆)/ 2a
(-3 + 5)/2 * 2
(-3 + 5)/4
2/4= 0,5
x'' = (-b - √∆)/ 2a
(-3 - 5)/2 * 2
(-3 - 5)/4
-8/4= -2
1 5 1