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
Algebraic Fractions – potentially A*