Factorisation by grouping
Usually when we are given an expression that contains 4 terms like
3x + 9b + 5ax + 15ab and there is no common factor throughout we factorise it by grouping terms that have common factors together.
Factorise the following completely.
Factorising quadratic expressions
The method of factorisation by grouping can be extended even to quadratic expressions. In the previous exercise there were some quadratic expressions we factorised which were however in different form from what we are going to look at right now.
Factorise the following completely