Question

Factorise:

$15( {x} + y)^{2} - 5x - 5y$
${x}^{8} - {y}^{8}$
${x}^{2} + (a \ + \frac{1}{a})x + 1$
${p}^{2} - 10p + 21$



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Answer 1

Answer:

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