Respuesta :

michals7241

Answer:

[tex] {b}^{2} - 4ac = 0 - 4 \times 1 \times ( - 4) = 16[/tex]

[tex] \sqrt{16} = 4[/tex]

[tex] \frac{ - b}{2a} = \frac{0}{2} = 0[/tex]

[tex] \frac{ - 4}{4} = - 1[/tex]

it is decreasing from negative infinity to 0