Question

What is the equation of the axis of symmetry for `y=x^2-25`??

Answer 1

The function can be written as `y=(x+5)(x-5)`
(special products)

Explanation:

So the zeroes are `x=-5andx=+5` and the axis is in the middle:

`x=0`

Note:
In general, when there is no `x` coefficient, the axis of symmetry is always `x=0`.