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Remember, the mark scheme is looking for ‘sophisticated expression’, but what does that actually mean? Put simply, ‘sophisticated expression’ is actually just when a student has enough confidence in th...

To factorise z³+1 into a linear and quadratic factor, it is best to try the factor theorem first. We set the equation to zero: z³+1=0.We need to find a value of z such that the above...

Transmitting Along Neurones

When a nerve cell is not stimulated, it is in a resting state. During this state, the inside of the axon is relatively more negative th...

We want to make y the subject of the equation and so we need to write it in the form y=f(x) where f(x) is a function in terms of x.When rearranging equations with fractions for a certain subject, factoris...

Towards the later half of the Cold War, Cuba played an increasingly larger role in the development of international tensions. It not only served as the backdrop for various events, such as the Cuban re...