Year 1 Factor Theorem
If you didn't like polynomial long division then use the GRID method instead (video link below)
Hopefully this week is straight forward.
The roots (solutions) once you've found f(a) = 0 give you where the graph crosses the x-axis
You can find where the graph crosses the y-axis simply by finding f(0).
The 6993 page has a heck of a lot more material if you want to go in depth.
Make sure your polynomial has all of the descending powers before trying to divide. If there is an x^2 missing then put 0x^2 into the expression.