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Use FOIL to expand the brackets. To do this, we start by multiplying the FIRST value in each bracket which in this case is x so we get x^2. Then we multiply the OUTSIDE two values, so here that is x and -...

To understand surds we have to understand powers and there uses. So to start we should look at powers such as what is 2² , 3², and 5². This shows us going up but then we l...

Firstly you want to factorise this expression. You have n², so you know you want to multiple n by itself. Next, you want to think carefully about what two numbers add to get -...

You want to end up an equation that show what a is in terms of p. To make things simpler, we want to get rid of the fraction on the right by multiplying both sides by (4 - a). If we do this we end up with...

To answer this question, create the least common denominator possible. In this instance, the LCD is 40. (I know this because multiples of 5 only end in 0 and 5, and 40 is the lowest multiple of 8 that mee...