The expression $20 l^{2} m + 30 a l m$ is equivalent to

- 5 l m (4 l - 6 a)

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- 5 l m (a l + 6 a)

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5 l m (4 l - 6 a)

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10 l m (2 l + 3 a)

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Solution

The correct option is D $10 l m (2 l + 3 a)$
Exp. is $20 l^{2} m + 30 a l m$
$= 10 l m (2 l + 3 a)$

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20 l^{2} m + 30 a l m = 10 l m (2 l + 3 a)

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