You can put this solution on YOUR website! really means x*x*x - 36*x. So, what appears in both terms? An x does. So take this out of both terms...ie factorise, leaving x*(x*x - 36), which is written as .
This is your answer.
However, can be thought of as . Being able to write terms within the bracket as the "difference of squares" means we can write this is a factored pair, as follows:
This is now fully factored... multiply out the brackets to make you fully accept that it is in fact
