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In Spanish, the "subjunctive" is described as a "mood" rather than a tense. It can be quite difficult to get your head round but it's just about remembering its different uses; actu...

Solve for x: 2x² + 7x + 6 = 0

The first thing to do is look at the left hand side and factorise it. To do this we use the reverse of FOIL. Then when the expres...

Goods can be classfied as either normal or inferior when we examine how a change in income of a consumer affects how much of agiven good they choose to consume.

In most circumstances one ...

Speaking exams can be very daunting, but it's important to remember that these exams haven't been designed to trip you up in any way. The examiner will want you to do well too! It's also important not to ...

This is the radius of a sphere around a black hole, at the surface of which, for any object to be be free of its gravitational pull its escape velocity be equal to the speed of light.