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Simplify: y+y-x×x

y+y=2y
x×x=x²
therefore, y+y-x×x=2y-x²

Answered by Kieran G. • Maths tutor

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I struggle with the following type of question: "The first four terms of an arithmetic sequence are 5, 9, 13, 17. Write down an expression, in terms of n, for the nth term in the sequence." How should I approach this?

Write (x-2)/3 + (x+3)/5 as a single fraction

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8^(3/4)*2^(x) = 16^(4/5). Work out the exact value of x.

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