You can put this solution on YOUR website! The x distance from the vertex to the first x intercept is the same as the distance from the vertex to the second x intercept.
A vertical line through the vertex is a line of symmetry.
has a vertex at (1,-1)
The first x intercept is x=0, 1 unit away from the vertex.
The second x intercept is x=2, also 1 unit away from the vertex.