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For this kind of question, the FOIL method can be used. You start by multiplying the FIRST aspects of both brackets, in this case giving 2x². Then you do the same with the OUTERS, the last elements in eac...

The first thing to prioritise in approaching an unseen piece is to understand what is actually happening in the text at a more basic level, identifying key events and characters. After establishing this, ...

Validity is a complex issue to understand as it is closely linked with reliability.

Ultimately, it can be defined as the extent to which something measures what it is supposed to. In simple terms, ...

In order to remember the definition of homeostasis it is useful to memorise the mnemonic ‘MACIE’; the Maintenance of A Constant Internal Environment. Conditions in the body must be constantly controlled b...

In graphite, each carbon atom is covalently bonded to three other carbon atoms. One of the four outer shell electrons of each carbon atom is therefore not engaged in bonding, and becomes delocalised. Thes...