Respuesta :

[tex]f(x) = \frac{12}{4x + 2}[/tex]
[tex]f(-1) = \frac{12}{4(-1) + 2}[/tex]
[tex]f(-1) = \frac{12}{-4 + 2}[/tex]
[tex]f(-1) = \frac{12}{-2}[/tex]
[tex]f(-1) = -6[/tex]