exam Maths Puzzle Numerical Ability

I don't have a problem to solve I just need some information on a couple of questions I have:
1) How do you compute the intercepts of a quadratic function?

2) What is the numbe

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exam Other Question
How would you write this rational expression in lowest terms?

5x-10/20-10x Hi, the following question has me a little stumped...
it is solve for x
e^2in(2x)
does this then become e^(2x)squared??
not quite sure what to do with this question.
thanks.