YV= -∆/4a
∆= b^2-4.a.c
∆= (24)^2-4.(-3).(-17)
∆= 576-204
∆= 372
YV= -372
____----------
_____4.(-3)
YV= -372/-12
YV=31
xv= -b/2.a
xv= -(24)
____---------
_____2.(-3)
xv= -24/-6
xv= 4
resposta correta letra c)
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YV= -∆/4a
∆= b^2-4.a.c
∆= (24)^2-4.(-3).(-17)
∆= 576-204
∆= 372
YV= -372
____----------
_____4.(-3)
YV= -372/-12
YV=31
xv= -b/2.a
xv= -(24)
____---------
_____2.(-3)
xv= -24/-6
xv= 4
resposta correta letra c)