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Write y=x²-4x+2k. And m:= (x_m, y_m) for the coordinates of our vertex. We deduce that x_m  is exactly the value of x for which y'=2x-4=0, because m is a minimum p...

The subjunctive in French is a special verb form (called a mood) which is used to express doubt or uncertainty, for example following phrases such as 'je ne pense pas que', 'je doute que', 'je ne crois pa...

Sodium Chloride has a high melting point, as it has a giant ionic lattice hence has strong electrostatic forces of attraction between oppositely charged ions, which requires lots of energy to overcome the...

The main thing to remember for Oxbridge interviews is to enjoy them! They are an incredible opportunity to talk one-to-one with an expert in your subject, so you can use the time to ask them questions abo...

To answer any question in history we need to pull out key terms from the wording of the question. In this question, 'Treaty of Versailles' and 'most important result' are the key terms, so keep them at th...