How to find the axis of symmetry algebraically

- How to find the equation of the axis of symmetry of the following parabola algebraically
- How to find the axis of symmetry of a parabola algebraically
- How do you find the axis of symmetry algebraically
- How to find axis of symmetry and vertex algebraically
- How to find the equation of the axis of symmetry of a parabola algebraically
- Finding horizontal and vertical asymptotes of function
- How to find the horizontal asymptote of a rational function
- Find the horizontal asymptotes of the function