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First, expand out the brackets. Initially, this will give you 20 - 4√3 + 5√12 - √36. √36 is the equivalent of 6, now giving up 20 - 4√3 + 5√12 - 6. We can combine the 20 and the 6 to give us 14 - 4√3 + 5√12....

You need to find two numbers that multiply to make 6 and add to make 5. Usually it's easier to find a correct multiplication and check that it satisfies the addition. Here the options are 6&1 or 2&3,...

A synapse is a small gap between neurones (nerve cells). Information is passed along the neurone as an electrical impulse, but to get from one neurone to the next, the information is converted into a chemica...

Li and K both have one electron in their outer shell and therefore perform chemical reactions in a similar way and share certain characteristics.

Osmosis is the net movement of water molecules from an area of high water potential to low water potential, commonly across a partially permeable membrane such as a cell's surface membrane.