Factorise $4 a^{2} - 8 a b$

4 a (a + 2 b)

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4 a (a - b)

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4 a (a - 2 b)

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a (a - 2 b)

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Solution

The correct option is B $4 a (a - 2 b)$
Given expression is $4 a^{2} - 8 a b$ .

Taking $4 a$ common from both terms of $4 a^{2} - 8 a b$ , we get:
$4 a (a - 2 b)$

Hence, $4 a^{2} - 8 a b = 4 a (a - 2 b)$ .

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