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Express the quadratic equation using the formula that uses the vertex (x and y of the minimum/ maximum value). The formula is f(x)=a(x-h)^2 + k, where h=-b/2a and k=f(h). Now we have that a=-1 from the pr...

Understanding concepts in exams is only part of the battle. To improve your marks you need to improve your exam technique!

For example: Have you correctly interpreted what the question is asking of...

The nominative, accusative and dative are cases: they affect adjective endings and the article used for a noun.  The nominative is used for the subject, the noun which is carrying out the action. In the s...

The subjunctive is a  'mood', like a tense, it changes the conjugation of the verb.  It is used after certain phrases such as 'il faut que' (it is necessary that) and bien que (although) e.g. 'il faut que...

Apply differentiation through first principles and understand the first principles to find the derivatives of common functions.