You can put this solution on YOUR website! "Intercept form"? What are you starting with? Do you have an equation for a parabola in general form and want it in a factored form? If you have y set equal to a factorable quadratic expression, then once factored, you can read the intercepts from the binomial factors.
Only an example:
You could use Completing The Square and put this into Standard Form, from which you can read the vertex; but can you instead, FACTORIZE the general form given?
Try some combinations, ....
-------------factored form, and the zeros would be and .