Question

1

Answer 1

This is a parabola that opens up.
Multiply out the right side using FOIL.
Then write it in the form: \(f(x) = ax^2 + bx + c \)
Then \(x = -\dfrac{b}{2a} \) gives you the equation of the axis of symmetry.
The vertex is on the axis of symmetry, so if you plug in \(-\dfrac{b}{2a} \) for x in the equation of the parabola, you'll get the y coordinate of the vertex.

Answer 2

(-1,-9) ?

Answer 3

I have no way of checking since you removed rthe problem.