hello i am not quite sure how to work out these questions could someone please explain to me what to do. Thanxx

Q1.

a. simplify 3a(squared)bx8a(cubed)b(squared)

b. Factorise completely x(squared)+xy-2x-2y

DOES ANYONE KNOW HOW TO WORK THIS OUT

Factorise completely x(squared)+xy-2x-2y