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Give the possible values of x when x^2 - 5x + 4 = 0

First, when faced with a question like this you must factorise the expression. So we need to factorise x 2 -5x+4 into 2 linear parts. (Linear terms are terms without any powers of x). To do this, we need to ...
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Answered by Sam D. • Maths tutor
6503 Views

Question: Expand (p + 2)(p - 5)

Expanding - or geting rid of brackets. Make sure you multiply everything by everything! Correct: p 2 +2p -5p -10 = p 2 -3p -10 Wrong: p 2 + 2p -5 ...forgot that the -5 also needs to be multiplied by (p+2) Wr...
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Answered by Abdul N. • Maths tutor
12476 Views

How do you know whether to use 'qui' or 'que'?

The easiest way to remember which of these pronouns to use is by learning the following simple rule: 'qui' comes before a verb, whereas 'que' comes before a subject noun or pronoun. For example, in the sente...
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Answered by Hannah O. • French tutor
3303 Views

In a pack of sweets, the ratio of red to blue sweets is 7:5. If there are 25 blue sweets, how many red sweets are there?

Ratios are used to show how things are shared. A ratio of 7:5 means that for every 7 red sweets there are 5 blue sweets. Step 1 - 7 + 5 = 12 This means there are 12 parts to the ratio Step 2 -Blue sweets = 7...
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Answered by Holly M. • Maths tutor
6850 Views

When should I use au, à la, à l' and aux?

First of all, it is important to understand the meaning we are trying to convey. Au, à la, à l' and aux are all ways of saying 'to the' or 'at the'. For example, in order to say 'I work at the cinema' in Fre...
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Answered by Caroline F. • French tutor
359209 Views