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While there are several ways to solve this, in this particular case I would favour the method of elimination. Since the value of y is the same and they have opposite signs, we can add the equations tog...

Since an x² is produced, we know that the factorised version will be (x+a)(x+b). To find a and b we need to consider the relationship between 2 and -8. It is going to be factorised into two brackets, d...

For general analysis of any primary source you should first consider two main things: the nature of the source, and who wrote it and for what auidence.

The nature of the source concerns w...

“Marginal” in economics means “additional” and “extra”. It is the idea that firms may take decisions by considering the effect of small changes from the existing situation. Economists rely heavily on t...