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y = 2x^2 + 4x - 8y = 2( x^2 + 2x - 4)Completing the square:y = 2( (x+1)^2 - 1 - 4 )y = 2(x+1)^2 -10the vertex of graph lies at the minimum value of y, and this occurs when x = -1:y = 2(-1+1)^2 -10y = -10t...

You're right, there aren't that many devices in London. That's not a problem, though. 

Your question gives you a lot of help. You're looking for powerlessness and how it's presen...

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Read widely around the question. Research the author/ playwright, historical/ political context and critical opinions on t...

The first thing to keep in mind is that only the topics in the syllabus will be tested. Your essay question will be based around one, or a combination of the syllabus topics. For the Russian Revolution...

(ii) Air resistance is said to be negligible in the question and since air resistance would be the only horizontal force acting on the jet, the horizontal force is also 0. (1 mark) This results in the hor...