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Grouping is essentially factorisation, it's just the idea that ax + bx = (a+b)x, which we already know. But the difficulty is in recognising this relationship when x is more complicated, for example when ...

While balancing equations by 'observation' or 'trial and error' is possible for simple compounds, it helps to have a general method of balancing these equations, so that, regardless of how complicated an ...

Utilitarianism is different from other moral theories because it sees happiness alone as the sole aim. Many other theories see duties as overriding happiness, and perhaps elevate virtue, honour or religio...

The current account deficit is the term we use to describe the difference between all of the goods and services exported from the UK, and those imported here. It is not an actual account of any person or ...