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There are two simple past tenses in Spanish: the imperfect and the preterite tenses.

The imperfect tense is used to describe continuous past actions, something which used to happen or to describe w...

3x^2+18x-1 Bracket out 3x^2+18x  Factorise by bringing out the common factor of 3 = 3(x^2+6x) Divide the x coefficient by 2  =  3(x^2+3x) And then remove the square on the x^2 variable and add a square to...

There are many specific purposes that require the use of either 'ser' or 'estar', but in the simplest terms there is one key difference. 'Ser' refers to 'being' in the sense of existence, describing what ...

Atoms and ions are both made up of proton's and neutrons in the nucleus with electrons orbiting around. The difference is atom's have equal number of proton's and electrons while ions have more or less el...

In short Aerobic is with oxygen - think aero=air, therefore oxygen is present. This process also produces more energy and takes place on mitochondria only producing carbon dioxide and water from glucose a...