Resposta:
[tex]V(\frac{-1}{4},-\frac{39}{8})[/tex]
Explicação passo a passo:
[tex]x_V=\frac{-b}{2a} \\\\x_V=\frac{-(-1)}{2(-2)} \\\\x_V=\frac{1}{-4} \\\\x_V=-\frac{1}{4} \\\\y_V=-2(-\frac{1}{4})^2-(-\frac{1}{4})-5\\\\y_V=-2*\frac{1}{16}+\frac{1}{4}-5 \\\\y_V=\frac{-1}{8} +\frac{1}{4} -5\\\\y_V=\frac{-1+2-40}{8} \\\\y_V=-\frac{39}{8} \\\\V(\frac{-1}{4},\frac{-39}{8})[/tex]
