Question 88 (iv)

Factorise the following expression.

$l^{2} m^{2} n - l m^{2} n^{2} - l^{2} m n^{2}$

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Solution

We have,
$l^{2} m^{2} n - l m^{2} n^{2} - l^{2} m n^{2} = l m n (l m - m n - l n)$

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l^{2} m^{2} n - l m^{2} n^{2} - l^{2} m n^{2}

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Question 92 (iv)

Factorise the following using the identity $a^{2} - b^{2} = (a + b) (a - b) .$

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