1. Can every algebraic expression be factorised?

No. Many expressions cannot be factorised and many need advanced techniques to factorise them.

2. What is the FIRST thing to look for when trying to factorise?

Always look to find a common factor first. This often makes the factorising easier.

3. Can a letter be a common factor?

Yes any number, variable or combination of the two can be a common factor.