Resposta :

MATHSPHIS
[tex]x_V=\frac{-b}{2a} \\ \\ x_V=\frac{4}{2}=2 \\ y_V=\frac{- \Delta}{4a} \\ \\ y_V=\frac{-[(-4)^2-4.1.(-5)]}{4}=\frac{-(16+20)}{4}=\frac{-36}{4}=-9 \\ \\ \boxed{V(2,-9)} [/tex]

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