Question

Axis of symmetry for f(x)=2x^2+8x+8

Answer 1

The axis of sym. goes thru the vertex of the parabolic graph of f(x), which we'll call (a,b).
Thus, use what you already know to determine the coordinates of the vertex (a,b).
Determine whether the axis of symmetry is horizontal or vertical.
If vertical, the eq'n of the ax. of sym. is simply x=a; if horiz, y=b. Good luck!