Identities and the 
sign at GCSE
To understand the idea of an identity, consider the following
question:
Question: Show that 
Solution: What this question wants is for you to
expand and simplify the LEFT HAND SIDE and show
that it equals the RIGHT HAND SIDE.
Well, here goes:
Perfect, we have got exactly
what the question wanted
We will now consider a range of
other examples up to A*. I have highlighted any important negative signs in
red
Example 1:
Show that 
Example 2:
Show that 
Algebraic Fractions –
potentially A*
FIRST EXAMPLE
SECOND EXAMPLE
