Search over 10,000 free study notes

This is a quick derivation of the quadratic formula for an GCSE Maths students looking to stretch themselves a little and go for that A*!

If we have a general quadratic equation:

Ionisation energy is the energy required to remove the most loosely bound (furthest out) electron from an atom, in the gaseous state.
As you move down a group in the periodic table, the number of...

As a frequently tested point in A level papers, the logic relationships of sentences and the according conjunctions are very important in reading Chinese articles. Unlike English langu...

In Japanese writing and reading system there are two different ways to read Chinese Kanji characters: 訓読み (kun yomi) and 音読み (on yomi). Historically kun yomi is used as a way to mark ...