Question
Factorise: $4p^2– 9q^2$
✓
Answer
$4p^2– 9q^2$
$= (2p)^2– (3q)^2$
$= (2p – 3q) (2p + 3q). . . . [$Using Identity $III$
$= (2p)^2– (3q)^2$
$= (2p – 3q) (2p + 3q). . . . [$Using Identity $III$
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