How would you use the following expression to approximate [(4-5x)/(1+2x)(2-x)] when x=5 (A2 pure)

So I cant really answer this question over text however, the method would be using partial fractions to split the two fractions into two, then using a binomial expansion, but the indicies will be negative so you'd have to be careful how you expand. Then once you have expanded the fractions you would simply plug 5 into the polynomial formed and that would be the answer. This question would be specifically for A2