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Proof by Induction: The method of Proof by Induction is a simple but very powerful t...

A complex number has the form a+bi. We call a the 'real' bit (ie. the bit on a regular number line) and b is the 'imaginary' bit.
To add or subtract complex numbers you just add the real bits of both...

Whilst it is very easy to just plug the numbers into the formula you are given on your formula sheet there is a much faster and more intuitive method of doing this. If we have n numbers beginning at a wit...

A question from 13 + specimen paper.

After the price of TV is reduced 30 % the price is £280. This means that £280 is 70% of the original price.

Therefore if you make an equation 280 x...

Question: 

Expand (2x-3)(4x+4) 

We will be using the FOIL method. FOIL is an ancronym: 

F=first

O=outside

I=inside

L=last

So, to begin, we start...