Respostas

2014-05-09T23:22:47-03:00
Xv = - b/2a             
Xv = - (-6)/ 2.1
Xv = 6/2
Xv = 3

Yv= -Δ/4a

Δ = b² - 4.a.c
Δ = (-6)² - 4.1.4
Δ = 36 - 16
Δ = 20

Yv = - 20/4.1
Yv = -20/4
Yv = -5
 
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