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Simultaneous Equations are equations involving 2 or more unknowns that are to have the same value in each equation. The aim is to eliminate all except one unknown which will then allow us to find the v...

In genetics, sometimes it is not easy to tell if an organism is heterozygous (having two different alleles of a gene) for a certain trait or if it is a homozygous (having the same identical alleles of ...

When thinking about stationary points, it is important to remember that these points happen when the gradient of the curve is 0 (-> dy/dx = 0), or if you prefer, when the rate of change of a graph is 0...

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...