Question 1 - A-Level Maths

Exam Board	Edexcel
Module	P4 (Pure Mathematics 4)
Year	2023
Session	October
Topic	Generalised Binomial Theorem
Type	Expand and state validity

(a) Find the first four terms, in ascending powers of $x$, of the binomial expansion of

$$\frac { 8 } { ( 2 - 5 x ) ^ { 2 } }$$ writing each term in simplest form.
(b) Find the range of values of $x$ for which this expansion is valid.