Respostas

2014-01-11T14:03:59-02:00
Xv = -b / 2.a
Xv = -(-2) / 2.1
Xv = 2/2
Xv = 1

Δ = b²-4.a.c
Δ = (-2)²-4.1.(-3)
Δ = 4 - 4.1.(-3)
Δ = 4 + 12
Δ = 16

Yv = -Δ / 4.a
Yv = -16 / 4.1
Yv = -16 / 4
Yv = - 4

V = {1, -4}