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We know that this is going to be a “U” shaped parabola as the graph is a positive x^2 graph. The y intercept is the point at which x=0. Substituting in 0 gives when x = 0, y = -21.Now we need the x intercept...

When you use the perfect tense, you use a form of either avoir or être with the past participle of the verb describing the main action. Most verbs use avoir, but some use être and these can be divided into t...

In German there are six modal verbs - können, wollen, dürfen, müssen, sollen and mögen. They allow you to say what you can, want, may, must, should or like to do. They are used slightly differently to other ...

By completing the square we find that f(x) = x 2 + 2x + 2 = (x+1) 2 + 1Since (x+1) 2 is a number that has been squared, it must be greater than or equal to zero. Therefore, f(x) = (x+1) 2 + 1 must be greater...

Both the imparfait and the passé composé are tenses that describe a past action. The passé composé is used to refer to completed events in the past e.g. j'ai mangé (I ate - indicating that you were eating in...