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(a+b)(a-b) Expansion and Visualisation

Question 88 v...

Question

Question 88 (v)

Factorise the following expression.

$3 p q r - 6 p^{2} q^{2} r^{2} - 15 r^{2}$

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Solution

We have, $3 p q r - 6 p^{2} q^{2} r^{2} - 15 r^{2}$
$= 3 p q r - 3 \times 2 p^{2} q^{2} r^{2} - 3 \times 5 r^{2} = 3 r (p q - 2 p^{2} q^{2} r - 5 r)$

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(a+b)(a-b) Expansion and Visualisation

Standard VII Mathematics

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