This gives \((x - 2)(x + 2)\). To check this answer, expand the brackets to see if the answer gives the original expression. If it does, then this is a correct factorisation.

The aim of the course is to continue the study of abstract algebraic structures and show how these structures ... irreducible polynomials and factorisation of polynomials. fields; fields as quotients ...

This gives \((x - 2)(x + 2)\). To check this answer, expand the brackets to see if the answer gives the original expression. If it does, then this is a correct factorisation.