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First factorise the quadratic into the form (x + a)(x + b) = 0.This will make x^2 + ax + bx + ab = 0.Work out a and b so that a + b = 7 and a b = 10.a = 5 b = 25+2 = 7 5 2 = 10.

The main two tips I would give for the 150 word question are as follows: Read the questions at least twice and underline any key words. As there is a choice between two questions for this section, it is a go...

Fixed are costs that do not change with the level of output. For example, heating bills would be a fixed cost. Whether we make 100 computers or 300 computers, our fixed costs do not change. Variable costs ar...

This is a linear sequence which we can see increasing by 4b with every consecutive term. Given the values of the first 3 terms, we can see that the 4th and 5th terms must be a + 14b and a + 18b respectively....

There are two ways to express an action in the future. You can either use the near future tense, using the present tense of 'aller' (to go) followed by the infinitive or the simple future tense where you con...