Question 91 (xii)

Factorise the following:

$p^{2} - 13 p - 30$

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Solution

We have, $p^{2} - 13 p - 30$
$p^{2} - (15 - 2) p - 30 = p^{2} - 15 p + 2 p - 30 = p (p - 15) + 2 (p - 15) = (p - 15) (p + 2)$

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Question 91 (iv)

Factorise the following:

$p^{2} + 14 p + 13$

l x + m y + m x + l y

l x + m y + m x + l y

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