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First you want to find out how many coins there are in bag A. So how many 20p coins do you need to make £7.20? This is the same as 720p. 720 divided by 20 is the same as 72 divided by 2 which is 36. So...
This is like solving 2 simultaneous equations. Both equations are in a form of y=ax^2+bx+c. Equate both equations together and you got: 3x2+5x+12 = 3x-8
Put both polynomi...
A neat trick to remember what we do to the powers when integrating and differentiating is that we INcrease the power when we INtegrate, and D...
I always think of the middle number as the sum and the last number as the product (in this example, we have the sum as 5 and the product as 6!) This just means that we have to look for two numbers which a...
This is one of the trickiest methods of calculus on the course, but it's important to know, and is very doable if you set up the problem right and remember the steps.
Integration by part...
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