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We are factorising 2a² +6a. When we factorise an expression, we look for common terms that we can place outside of a bracket. Another way of thinking about this is something that both 2a^2 ...

The first step is to expand the expression. This can be done using the FOIL method. This means that we multiply the First, Outside, Inside and Last terms in the bracket.First: x . x = x²Outside...

We recall that the number of ways to order n distinct objects in a STRING is n! (n factorial, n.(n-1).(n-2)...2.1 Familiarity with this is prerequisites for tackling this question)We begin, as is best in ...

This kind of question demonstrates the fact that certain problems can be expressed in much simpler ways so they be easily solved.  In this particular example the question can be simplified to "int...

This example provides us with a better understanding of how "Integration by parts" works. Building an extensive knowledge of Integral calculus requires a lot of work, but once the basics are ...